Do not reshow the text message after navigating to the next video.

ui/file_manager/video_player/js/media_controls.js

Index: ui/file_manager/video_player/js/media_controls.js
diff --git a/ui/file_manager/video_player/js/media_controls.js b/ui/file_manager/video_player/js/media_controls.js
index e246c830be50fa0be3637114ae990a52dd5f3e5a..9a87bf198e11e8843bf00bc154d5ba38701a15fa 100644
--- a/ui/file_manager/video_player/js/media_controls.js
+++ b/ui/file_manager/video_player/js/media_controls.js
@@ -361,6 +361,10 @@ MediaControls.prototype.attachMedia = function(mediaElement) {
   this.media_.addEventListener('timeupdate', this.onMediaProgressBound_);
   this.media_.addEventListener('error', this.onMediaError_);
 
+  // If the text banner is being displayed, hide it immediately, since it is
+  // related to the previous media.
+  this.textBanner_.removeAttribute('visible');
+
   // Reflect the media state in the UI.
   this.onMediaDuration_();
   this.onMediaPlay_(this.isPlaying());