Add Video to Jumbotron Zeal theme?

Thanks for the theme guys, loving it.

Having trouble applying a video as the ‘static image’ on our homepage Jumbotron though.

I believe it is possible to add a video on background-attatchment fixed content, however the videos are not showing in the jumbotron media library (but are in my main media library).

Have tried editing the .htaccess file to include mime type video/mp4 .mp4 .m4v and it is recognising the .mp4 as video in the preview bar of jumbotron ‘customise’ page on wordpress however when published it doesn’t show.

Any thoughts here guys?

Many Thanks,
Oli