Address review comments

Author: Stypox

app/src/main/java/org/schabi/newpipe/player/Player.java

@@ -2219,20 +2219,20 @@ public void useVideoAndSubtitles(final boolean videoAndSubtitlesEnabled) {
             final SourceType sourceType = videoResolver.getStreamSourceType()
                     .orElse(SourceType.VIDEO_WITH_AUDIO_OR_AUDIO_ONLY);
 
-            setRecovery();
+            setRecovery(); // making sure to save playback position before reloadPlayQueueManager()
 
             if (playQueueManagerReloadingNeeded(sourceType, info, getVideoRendererIndex())) {
                 reloadPlayQueueManager();
             }
         }, () -> {
             /*
             The current metadata may be null sometimes (for e.g. when using an unstable connection
-            in livestreams) so we will be not able to execute the block below
+            in livestreams) so we will be not able to execute the block above
 
             Reload the play queue manager in this case, which is the behavior when we don't know the
             index of the video renderer or playQueueManagerReloadingNeeded returns true
             */
-            setRecovery();
+            setRecovery(); // making sure to save playback position before reloadPlayQueueManager()
             reloadPlayQueueManager();
         });
 

app/src/main/java/org/schabi/newpipe/player/resolver/PlaybackResolver.java

@@ -201,6 +201,8 @@ static MediaSource maybeBuildLiveMediaSource(final PlayerDataSource dataSource,
 
         try {
             final StreamInfoTag tag = StreamInfoTag.of(info);
+            // Prefer DASH over HLS because of an exoPlayer bug that causes the background player to
+            // also fetch the video stream even if it is supposed to just fetch the audio stream.
             if (!info.getDashMpdUrl().isEmpty()) {
                 return buildLiveMediaSource(
                         dataSource, info.getDashMpdUrl(), C.CONTENT_TYPE_DASH, tag);

app/src/main/java/org/schabi/newpipe/player/ui/BackgroundPlayerUi.java

@@ -5,8 +5,8 @@
 import org.schabi.newpipe.player.Player;
 
 /**
- * This is not a real UI for the background player, it used to disable fetching video and text
- * tracks with it.
+ * This is not a "graphical" UI for the background player, but it is used to disable fetching video
+ * and text tracks with it.
  *
  * <p>
  * This allows reducing data usage for manifest sources with demuxed audio and video,