Hello Ciaran,
I am trying to get the Video Background working in Boutique.
In
https://www.clonesfilmfestival.com

On a Mac and PC Chrome The Background video does not Autoplay,
<iframe frameborder="0" height="100%" width="100%" id="bgvid" src="//http://www.youtube.com/embed/P-ZhGNgVtzw?autoplay=1&controls=0&loop=1&showinfo=0&disablekb=1&rel=0&enablejsapi=1&playlist=PLAYLIST_ID_HERE";></iframe>
In MicroSoftEdge the Video Plays but does not loop ;-(

I have downloaded and Installed the most recent Boutique Template
Can throw your keen diagnostic eye on it and tell me where I've messed up!