diff --git a/app/src/main/java/org/schabi/newpipe/ActionBarHandler.java b/app/src/main/java/org/schabi/newpipe/ActionBarHandler.java
index fdf02301e..56f78d0d6 100644
--- a/app/src/main/java/org/schabi/newpipe/ActionBarHandler.java
+++ b/app/src/main/java/org/schabi/newpipe/ActionBarHandler.java
@@ -1,13 +1,11 @@
 package org.schabi.newpipe;
 
-import android.app.DownloadManager;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.net.Uri;
 import android.os.Bundle;
-import android.preference.Preference;
 import android.preference.PreferenceManager;
 import android.support.v4.view.MenuItemCompat;
 import android.support.v7.app.ActionBar;
@@ -19,8 +17,6 @@ import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.widget.ArrayAdapter;
 
-import java.io.File;
-
 /**
  * Created by Christian Schabesberger on 18.08.15.
  *
@@ -48,7 +44,7 @@ public class ActionBarHandler {
     private static ActionBarHandler handler = null;
 
     private Context context = null;
-    private String webisteUrl = "";
+    private String websiteUrl = "";
     private AppCompatActivity activity;
     private VideoInfo.VideoStream[] videoStreams = null;
     private VideoInfo.AudioStream audioStream = null;
@@ -64,7 +60,7 @@ public class ActionBarHandler {
         return handler;
     }
 
-    class ForamatItemSelectListener implements ActionBar.OnNavigationListener {
+    class FormatItemSelectListener implements ActionBar.OnNavigationListener {
         @Override
         public boolean onNavigationItemSelected(int itemPosition, long itemId) {
             selectFormatItem((int)itemId);
@@ -98,7 +94,7 @@ public class ActionBarHandler {
         if(activity != null) {
             ActionBar ab = activity.getSupportActionBar();
             ab.setListNavigationCallbacks(itemAdapter
-                    ,new ForamatItemSelectListener());
+                    ,new FormatItemSelectListener());
             ab.setSelectedNavigationItem(defaultResolutionPos);
         }
 
@@ -114,9 +110,9 @@ public class ActionBarHandler {
             }
         } else if(preferedFormat.equals("m4a")){
             for(VideoInfo.AudioStream s : audioStreams) {
-                Log.d(TAG, VideoInfo.getMimeById(s.format) + " : " + Integer.toString(s.bandWidth));
+                Log.d(TAG, VideoInfo.getMimeById(s.format) + " : " + Integer.toString(s.bandwidth));
                 if(s.format == VideoInfo.I_M4A &&
-                        (audioStream == null || audioStream.bandWidth > s.bandWidth)) {
+                        (audioStream == null || audioStream.bandwidth > s.bandwidth)) {
                     audioStream = s;
                     Log.d(TAG, "last choosen");
                 }
@@ -162,7 +158,7 @@ public class ActionBarHandler {
                 if(!videoTitle.isEmpty()) {
                     Intent intent = new Intent();
                     intent.setAction(Intent.ACTION_SEND);
-                    intent.putExtra(Intent.EXTRA_TEXT, webisteUrl);
+                    intent.putExtra(Intent.EXTRA_TEXT, websiteUrl);
                     intent.setType("text/plain");
                     context.startActivity(Intent.createChooser(intent, context.getString(R.string.shareDialogTitle)));
                 }
@@ -192,7 +188,7 @@ public class ActionBarHandler {
     }
 
     public void setVideoInfo(String websiteUrl, String videoTitle) {
-        this.webisteUrl = websiteUrl;
+        this.websiteUrl = websiteUrl;
         this.videoTitle = videoTitle;
     }
 
@@ -239,7 +235,7 @@ public class ActionBarHandler {
                 Intent intent = new Intent(context, PlayVideoActivity.class);
                 intent.putExtra(PlayVideoActivity.VIDEO_TITLE, videoTitle);
                 intent.putExtra(PlayVideoActivity.STREAM_URL, videoStreams[selectedStream].url);
-                intent.putExtra(PlayVideoActivity.VIDEO_URL, webisteUrl);
+                intent.putExtra(PlayVideoActivity.VIDEO_URL, websiteUrl);
                 context.startActivity(intent);
             }
         }
@@ -267,7 +263,7 @@ public class ActionBarHandler {
         if(!videoTitle.isEmpty()) {
             Intent intent = new Intent();
             intent.setAction(Intent.ACTION_VIEW);
-            intent.setData(Uri.parse(webisteUrl));
+            intent.setData(Uri.parse(websiteUrl));
 
             context.startActivity(Intent.createChooser(intent, context.getString(R.string.chooseBrowser)));
         }
@@ -278,7 +274,7 @@ public class ActionBarHandler {
             try {
                 Intent intent = new Intent(Intent.ACTION_VIEW);
                 intent.setPackage(KORE_PACKET);
-                intent.setData(Uri.parse(webisteUrl.replace("https", "http")));
+                intent.setData(Uri.parse(websiteUrl.replace("https", "http")));
                 context.startActivity(intent);
             } catch (Exception e) {
                 e.printStackTrace();
diff --git a/app/src/main/java/org/schabi/newpipe/Extractor.java b/app/src/main/java/org/schabi/newpipe/Extractor.java
index b07e263b8..102a39494 100644
--- a/app/src/main/java/org/schabi/newpipe/Extractor.java
+++ b/app/src/main/java/org/schabi/newpipe/Extractor.java
@@ -1,7 +1,5 @@
 package org.schabi.newpipe;
 
-import android.graphics.Bitmap;
-
 /**
  * Created by Christian Schabesberger on 10.08.15.
  *
diff --git a/app/src/main/java/org/schabi/newpipe/PlayVideoActivity.java b/app/src/main/java/org/schabi/newpipe/PlayVideoActivity.java
index 7f71ef334..07a5886aa 100644
--- a/app/src/main/java/org/schabi/newpipe/PlayVideoActivity.java
+++ b/app/src/main/java/org/schabi/newpipe/PlayVideoActivity.java
@@ -5,7 +5,6 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.pm.ActivityInfo;
 import android.content.res.Configuration;
-import android.content.res.Resources;
 import android.media.MediaPlayer;
 import android.net.Uri;
 import android.os.Build;
@@ -19,15 +18,11 @@ import android.view.Display;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
-import android.view.Surface;
 import android.view.View;
 import android.view.WindowManager;
 import android.widget.Button;
-import android.widget.FrameLayout;
-import android.widget.LinearLayout;
 import android.widget.MediaController;
 import android.widget.ProgressBar;
-import android.widget.SeekBar;
 import android.widget.VideoView;
 
 /**
@@ -84,7 +79,7 @@ public class PlayVideoActivity extends AppCompatActivity {
         setContentView(R.layout.activity_play_video);
 
         isLandscape = checkIfLandscape();
-        hasSoftKeys = checkIfhasSoftKeys();
+        hasSoftKeys = checkIfHasSoftKeys();
 
         actionBar = getSupportActionBar();
         actionBar.setDisplayHomeAsUpEnabled(true);
@@ -203,10 +198,10 @@ public class PlayVideoActivity extends AppCompatActivity {
 
         if (config.orientation == Configuration.ORIENTATION_LANDSCAPE) {
             isLandscape = true;
-            adjustMediaControllMetrics();
+            adjustMediaControlMetrics();
         } else if (config.orientation == Configuration.ORIENTATION_PORTRAIT){
             isLandscape = false;
-            adjustMediaControllMetrics();
+            adjustMediaControlMetrics();
         }
     }
 
@@ -229,7 +224,7 @@ public class PlayVideoActivity extends AppCompatActivity {
             uiIsHidden = false;
             mediaController.show(100000);
             actionBar.show();
-            adjustMediaControllMetrics();
+            adjustMediaControlMetrics();
             getWindow().clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
             Handler handler = new Handler();
             handler.postDelayed(new Runnable() {
@@ -259,7 +254,7 @@ public class PlayVideoActivity extends AppCompatActivity {
                 WindowManager.LayoutParams.FLAG_FULLSCREEN);
     }
 
-    private void adjustMediaControllMetrics() {
+    private void adjustMediaControlMetrics() {
         MediaController.LayoutParams mediaControllerLayout
                 = new MediaController.LayoutParams(MediaController.LayoutParams.MATCH_PARENT,
                 MediaController.LayoutParams.WRAP_CONTENT);
@@ -274,7 +269,7 @@ public class PlayVideoActivity extends AppCompatActivity {
         mediaController.setLayoutParams(mediaControllerLayout);
     }
 
-    private boolean checkIfhasSoftKeys(){
+    private boolean checkIfHasSoftKeys(){
         if(Build.VERSION.SDK_INT >= 17) {
             return getNavigationBarHeight() != 0 || getNavigationBarWidth() != 0;
         } else {
diff --git a/app/src/main/java/org/schabi/newpipe/SearchEngine.java b/app/src/main/java/org/schabi/newpipe/SearchEngine.java
index e7f861fcd..5d986f2a4 100644
--- a/app/src/main/java/org/schabi/newpipe/SearchEngine.java
+++ b/app/src/main/java/org/schabi/newpipe/SearchEngine.java
@@ -1,7 +1,5 @@
 package org.schabi.newpipe;
 
-import android.graphics.Bitmap;
-
 import java.util.Vector;
 
 /**
diff --git a/app/src/main/java/org/schabi/newpipe/VideoInfo.java b/app/src/main/java/org/schabi/newpipe/VideoInfo.java
index 9b75be802..5181b6d8b 100644
--- a/app/src/main/java/org/schabi/newpipe/VideoInfo.java
+++ b/app/src/main/java/org/schabi/newpipe/VideoInfo.java
@@ -110,13 +110,13 @@ public class VideoInfo {
     }
 
     public static class AudioStream {
-        public AudioStream(String url, int format, int bandWidth, int samplingRate) {
+        public AudioStream(String url, int format, int bandwidth, int samplingRate) {
             this.url = url; this.format = format;
-            this.bandWidth = bandWidth; this.samplingRate = samplingRate;
+            this.bandwidth = bandwidth; this.samplingRate = samplingRate;
         }
         public String url = "";
         public int format = -1;
-        public int bandWidth = -1;
+        public int bandwidth = -1;
         public int samplingRate = -1;
 
     }
diff --git a/app/src/main/java/org/schabi/newpipe/VideoItemDetailActivity.java b/app/src/main/java/org/schabi/newpipe/VideoItemDetailActivity.java
index cc0c95edf..7675b312a 100644
--- a/app/src/main/java/org/schabi/newpipe/VideoItemDetailActivity.java
+++ b/app/src/main/java/org/schabi/newpipe/VideoItemDetailActivity.java
@@ -1,22 +1,13 @@
 package org.schabi.newpipe;
 
-import android.content.ContentProviderOperation;
-import android.content.res.Configuration;
-import android.os.Build;
-import android.preference.PreferenceManager;
-import android.support.v7.app.ActionBar;
-import android.support.v7.app.AppCompatActivity;
 import android.content.Intent;
 import android.os.Bundle;
+import android.preference.PreferenceManager;
 import android.support.v4.app.NavUtils;
-import android.util.DisplayMetrics;
-import android.util.Log;
+import android.support.v7.app.AppCompatActivity;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
-import android.view.WindowManager;
-
-import org.schabi.newpipe.youtube.YoutubeExtractor;
 
 
 /**
diff --git a/app/src/main/java/org/schabi/newpipe/VideoItemDetailFragment.java b/app/src/main/java/org/schabi/newpipe/VideoItemDetailFragment.java
index 41594b1e8..e4ea1f7f7 100644
--- a/app/src/main/java/org/schabi/newpipe/VideoItemDetailFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/VideoItemDetailFragment.java
@@ -3,13 +3,11 @@ package org.schabi.newpipe;
 import android.app.Activity;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
-import android.media.Image;
 import android.os.Bundle;
 import android.os.Handler;
 import android.preference.PreferenceManager;
 import android.support.design.widget.FloatingActionButton;
 import android.support.v4.app.Fragment;
-import android.support.v7.app.ActionBar;
 import android.text.Html;
 import android.text.method.LinkMovementMethod;
 import android.util.DisplayMetrics;
@@ -17,14 +15,11 @@ import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
-import android.widget.GridLayout;
 import android.widget.ImageView;
-import android.widget.ListView;
 import android.widget.ProgressBar;
 import android.widget.RelativeLayout;
 import android.widget.TextView;
 
-
 import java.net.URL;
 import java.util.Vector;
 
@@ -216,7 +211,7 @@ public class VideoItemDetailFragment extends Fragment {
                     thumbnailView.setImageBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.not_available_monkey));
                     break;
                 default:
-                    Log.e(TAG, "Video Availeble Status not known.");
+                    Log.e(TAG, "Video Available Status not known.");
             }
 
             if(autoPlayEnabled) {
diff --git a/app/src/main/java/org/schabi/newpipe/VideoItemListActivity.java b/app/src/main/java/org/schabi/newpipe/VideoItemListActivity.java
index ce2da6cb3..483261f76 100644
--- a/app/src/main/java/org/schabi/newpipe/VideoItemListActivity.java
+++ b/app/src/main/java/org/schabi/newpipe/VideoItemListActivity.java
@@ -2,21 +2,14 @@ package org.schabi.newpipe;
 
 import android.content.Context;
 import android.content.Intent;
-import android.content.res.Configuration;
-import android.os.Build;
 import android.os.Bundle;
-import android.os.Environment;
-import android.preference.PreferenceManager;
 import android.support.v7.app.AppCompatActivity;
-import android.util.DisplayMetrics;
-import android.util.Log;
+import android.support.v7.widget.SearchView;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.WindowManager;
 import android.view.inputmethod.InputMethodManager;
-import android.support.v7.widget.SearchView;
 import android.widget.ImageView;
 
 /**
diff --git a/app/src/main/java/org/schabi/newpipe/VideoItemListFragment.java b/app/src/main/java/org/schabi/newpipe/VideoItemListFragment.java
index c924aa227..200994773 100644
--- a/app/src/main/java/org/schabi/newpipe/VideoItemListFragment.java
+++ b/app/src/main/java/org/schabi/newpipe/VideoItemListFragment.java
@@ -13,7 +13,6 @@ import android.widget.ListView;
 import android.widget.Toast;
 
 import java.net.URL;
-import java.util.List;
 import java.util.Vector;
 
 
@@ -54,14 +53,14 @@ public class VideoItemListFragment extends ListFragment {
 
     private class ResultRunnable implements Runnable {
         private SearchEngine.Result result;
-        private int reuqestId;
+        private int requestId;
         public ResultRunnable(SearchEngine.Result result, int requestId) {
             this.result = result;
-            this.reuqestId = requestId;
+            this.requestId = requestId;
         }
         @Override
         public void run() {
-            updateListOnResult(result, reuqestId);
+            updateListOnResult(result, requestId);
         }
     }
 
@@ -213,7 +212,7 @@ public class VideoItemListFragment extends ListFragment {
             loadThumbsThread = new Thread(loadThumbsRunnable);
             loadThumbsThread.start();
         } catch(java.lang.IllegalStateException e) {
-            Log.w(TAG, "Trying to set value while activity is not existing anymore.");
+            Log.w(TAG, "Trying to set value while activity doesn't anymore.");
         } catch(Exception e) {
             e.printStackTrace();
         }
@@ -230,7 +229,7 @@ public class VideoItemListFragment extends ListFragment {
         }
         if(searchThread != null) {
             searchRunnable.terminate();
-            // No need to join, since we don't realy terminate the thread. We just demand
+            // No need to join, since we don't really terminate the thread. We just demand
             // it to post its result runnable into the gui main loop.
         }
     }
diff --git a/app/src/main/java/org/schabi/newpipe/youtube/YoutubeExtractor.java b/app/src/main/java/org/schabi/newpipe/youtube/YoutubeExtractor.java
index f7188d8af..6b8ef314b 100644
--- a/app/src/main/java/org/schabi/newpipe/youtube/YoutubeExtractor.java
+++ b/app/src/main/java/org/schabi/newpipe/youtube/YoutubeExtractor.java
@@ -1,30 +1,29 @@
 package org.schabi.newpipe.youtube;
-import org.jsoup.nodes.Element;
-import org.schabi.newpipe.Downloader;
-import org.schabi.newpipe.Extractor;
-import org.schabi.newpipe.VideoInfo;
 
 import android.util.Log;
 import android.util.Xml;
 
+import org.json.JSONObject;
+import org.jsoup.Jsoup;
+import org.jsoup.nodes.Document;
+import org.jsoup.nodes.Element;
+import org.jsoup.parser.Parser;
+import org.mozilla.javascript.Context;
+import org.mozilla.javascript.Function;
+import org.mozilla.javascript.ScriptableObject;
+import org.schabi.newpipe.Downloader;
+import org.schabi.newpipe.Extractor;
+import org.schabi.newpipe.VideoInfo;
+import org.schabi.newpipe.VideoInfoItem;
+import org.xmlpull.v1.XmlPullParser;
+
 import java.io.StringReader;
 import java.net.URI;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.Vector;
-import java.util.regex.Pattern;
 import java.util.regex.Matcher;
-import org.json.JSONObject;
-
-import org.jsoup.Jsoup;
-import org.jsoup.nodes.Document;
-import org.jsoup.parser.Parser;
-
-import org.mozilla.javascript.Context;
-import org.mozilla.javascript.Function;
-import org.mozilla.javascript.ScriptableObject;
-import org.schabi.newpipe.VideoInfoItem;
-import org.xmlpull.v1.XmlPullParser;
+import java.util.regex.Pattern;
 
 /**
  * Created by Christian Schabesberger on 06.08.15.
@@ -48,8 +47,6 @@ import org.xmlpull.v1.XmlPullParser;
 
 public class YoutubeExtractor implements Extractor {
 
-
-
     private static final String TAG = YoutubeExtractor.class.toString();
 
     // These lists only contain itag formats that are supported by the common Android Video player.
@@ -93,7 +90,7 @@ public class YoutubeExtractor implements Extractor {
         }
     }
 
-    private String decryptoinCode = "";
+    private String decryptionCode = "";
     private static final String DECRYPTION_FUNC_NAME="decrypt";
 
     @Override
@@ -189,12 +186,12 @@ public class YoutubeExtractor implements Extractor {
             if(playerUrl.startsWith("//")) {
                 playerUrl = "https:" + playerUrl;
             }
-            if(decryptoinCode.isEmpty()) {
-                decryptoinCode = loadDecryptioinCode(playerUrl);
+            if(decryptionCode.isEmpty()) {
+                decryptionCode = loadDecryptionCode(playerUrl);
             }
 
             // extract audio
-            videoInfo.audioStreams = parseDashManifest(dashManifest, decryptoinCode);
+            videoInfo.audioStreams = parseDashManifest(dashManifest, decryptionCode);
 
             //------------------------------------
             // extract video stream url
@@ -213,10 +210,10 @@ public class YoutubeExtractor implements Extractor {
 
                 // if video has a signature: decrypt it and add it to the url
                 if(tags.get("s") != null) {
-                    if(decryptoinCode.isEmpty()) {
-                        decryptoinCode = loadDecryptioinCode(playerUrl);
+                    if(decryptionCode.isEmpty()) {
+                        decryptionCode = loadDecryptionCode(playerUrl);
                     }
-                    streamUrl = streamUrl + "&signature=" + decryptSignature(tags.get("s"), decryptoinCode);
+                    streamUrl = streamUrl + "&signature=" + decryptSignature(tags.get("s"), decryptionCode);
                 }
 
                 if(resolveFormat(itag) != -1) {
@@ -236,7 +233,7 @@ public class YoutubeExtractor implements Extractor {
         }
 
         //-------------------------------
-        // extrating from html page
+        // extracting from html page
         //-------------------------------
 
 
@@ -438,7 +435,7 @@ public class YoutubeExtractor implements Extractor {
         return retval;
     }
 
-    private String loadDecryptioinCode(String playerUrl) {
+    private String loadDecryptionCode(String playerUrl) {
         String playerCode = Downloader.download(playerUrl);
         String decryptionFuncName = "";
         String decryptionFunc = "";
diff --git a/app/src/main/java/org/schabi/newpipe/youtube/YoutubeSearchEngine.java b/app/src/main/java/org/schabi/newpipe/youtube/YoutubeSearchEngine.java
index 395a3d768..841d0a89b 100644
--- a/app/src/main/java/org/schabi/newpipe/youtube/YoutubeSearchEngine.java
+++ b/app/src/main/java/org/schabi/newpipe/youtube/YoutubeSearchEngine.java
@@ -1,18 +1,17 @@
 package org.schabi.newpipe.youtube;
 
-import org.schabi.newpipe.Downloader;
-import org.schabi.newpipe.SearchEngine;
-import org.schabi.newpipe.VideoInfoItem;
-
 import android.net.Uri;
 import android.util.Log;
 
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-
 import org.jsoup.Jsoup;
 import org.jsoup.nodes.Document;
 import org.jsoup.nodes.Element;
+import org.schabi.newpipe.Downloader;
+import org.schabi.newpipe.SearchEngine;
+import org.schabi.newpipe.VideoInfoItem;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
 
 /**
  * Created by Christian Schabesberger on 09.08.15.