Autoplay video suddenly stopped working

Site URL: https://www.mickbarker.co.uk/ribble-valley

Hi

I have an embedded vimeo on a project page set to autoplay and loop. This was working fine, until it suddenly stopped. No settings were changed, it literally just stopped working. The loop works, but I need the autoplay.

I've tried in all browsers and on different machines but it's no use.

<iframe allow="autoplay" allowfullscreen src="https://player.vimeo.com/video/388053112?autoplay=1&amp;loop=1&amp;autopause=0&amp;wmode=opaque" width="1500" frameborder="0" height="792"></iframe>

This is the embed code. The video has no sound either.

I've tried all combinations of embed code found on various sites, but no success yet. Any help would be greatly appreciated!

Just experimented and the code works fine on a blank page, it's just not working on a Project page for some reason.