diff --git a/src/plugins/htmlVideoPlayer/plugin.js b/src/plugins/htmlVideoPlayer/plugin.js
index ccd3dcbc1e..11c5c85954 100644
--- a/src/plugins/htmlVideoPlayer/plugin.js
+++ b/src/plugins/htmlVideoPlayer/plugin.js
@@ -116,7 +116,7 @@ function tryRemoveElement(elem) {
     }
 
     function zoomIn(elem) {
-        return new Promise(function (resolve, reject) {
+        return new Promise(resolve => {
             const duration = 240;
             elem.style.animation = `htmlvideoplayer-zoomin ${duration}ms ease-in normal`;
             hidePrePlaybackPage();
@@ -552,26 +552,6 @@ function tryRemoveElement(elem) {
             this._castPlayer.playWhenHaveEnoughData();
         }
 
-        /**
-         * @private
-         */
-        initMediaManager() {
-            mediaManager.defaultOnLoad = mediaManager.onLoad.bind(mediaManager);
-            mediaManager.onLoad = this.onMediaManagerLoadMedia;
-
-            //mediaManager.defaultOnPlay = mediaManager.onPlay.bind(mediaManager);
-            //mediaManager.onPlay = function (event) {
-            //    // TODO ???
-            //    mediaManager.defaultOnPlay(event);
-            //};
-
-            mediaManager.defaultOnStop = mediaManager.onStop.bind(mediaManager);
-            mediaManager.onStop = function (event) {
-                playbackManager.stop();
-                mediaManager.defaultOnStop(event);
-            };
-        }
-
         /**
          * @private
          */