captions and plyr: choose correct default track

Author: zrose584

youtube/watch.py

@@ -258,6 +258,9 @@ def score_lang(lang):
             # set as on by default since settings indicate to set it as such even if it's not manual
             sources[-1]['on'] = True
 
+    if settings.video_player == 1:  # Plyr
+        sources[-1]['on'] = True
+
     return sources