[#693] fixes subtitles in youtube and vimeo

players/vimeo/popcorn.vimeo.js

@@ -296,6 +296,7 @@
       this.initialTime = 0;
       this.played = 0;
       this.readyState = 0;
+      this.parentNode = this._target.parentNode;
 
       this.previousCurrentTime = this.currentTime;
       this.previousVolume = this.volume;

players/youtube/popcorn.youtube.js

@@ -198,6 +198,7 @@ var onYouTubePlayerReady;
     this._container.style.height = this._target.style.height = options.height || this._target.style.height || "350px";
     this._container.style.width  = this._target.style.width  = options.width || this._target.style.width  || "460px";
     this._target.appendChild( this._container );
+    this.parentNode = this._target.parentNode;
 
     this.offsetHeight = +this._target.offsetHeight;
     this.offsetWidth = +this._target.offsetWidth;