Help> subtitle does not working

[videojs id=”video_player” youtube=”http://www.youtube.com/watch?v=YPkSzz8jFz8″%5D%5Btrack kind=”captions” src=”http://xxxx.com/wp-content/uploads/bunny.srt” srclang=”en” label=”English” default=”true”][/videojs]

This is my code…. but caption(subtitle) did not show.
Help me…

theme : avada 3.4.1

https://wordpress.org/plugins/videojs-html5-video-player-for-wordpress/