diff --git a/app/src/main/java/dk/adamino/rehabilitation/GUI/YoutubeActivity.java b/app/src/main/java/dk/adamino/rehabilitation/GUI/YoutubeActivity.java
index 1469459..1078a5d 100644
--- a/app/src/main/java/dk/adamino/rehabilitation/GUI/YoutubeActivity.java
+++ b/app/src/main/java/dk/adamino/rehabilitation/GUI/YoutubeActivity.java
@@ -82,10 +82,13 @@ private void setExerciseInformation(Exercise exercise) {
      * @param wasRestored
      */
     @Override
-    public void onInitializationSuccess(YouTubePlayer.Provider provider, YouTubePlayer youTubePlayer, boolean wasRestored) {
+    public void onInitializationSuccess(YouTubePlayer.Provider provider,
+                                        YouTubePlayer youTubePlayer, boolean wasRestored) {
 
-        youTubePlayer.setPlayerStateChangeListener(mPlayerStateChangeListener);
+        // Makes it possible for user interactions such as play/pause the video.
         youTubePlayer.setPlaybackEventListener(mPlaybackEventListener);
+        // Makes sure that the video is loaded, started, ended and if error.
+        youTubePlayer.setPlayerStateChangeListener(mPlayerStateChangeListener);
 
         // Start buffering.
         if (!wasRestored) {
@@ -108,6 +111,10 @@ public void onInitializationFailure(YouTubePlayer.Provider provider, YouTubeInit
         Toast.makeText(this, "FAILED TO INITIALIZE", Toast.LENGTH_SHORT).show();
     }
 
+
+
+
+
     // Interface definition for callbacks that are invoked when video playback events occur.
     private YouTubePlayer.PlaybackEventListener mPlaybackEventListener = new YouTubePlayer.PlaybackEventListener() {
         @Override
@@ -155,12 +162,12 @@ public void onAdStarted() {
 
         @Override
         public void onVideoStarted() {
-            // Called when the video reaches its end.
+            // Called when playback of the video starts.
         }
 
         @Override
         public void onVideoEnded() {
-            // Called when playback of the video starts.
+            // Called when the video reaches its end.
         }
 
         @Override