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Frolin, I answered your original ask but it seems to have passed by.

Here are two approaches: 135692

To top one is a modification of YT's embed to autoplay & mute & loop.
The YT controls...

Chris, I can only agree until you find the file(s) are too big or downloads are blocked.
I took the OP ask to be focused on YT as the host as @Frolin said he had permission to 'share'; download may...

Frolin, to block YT Buttons, you place the IFRAME under a 99% Transparent block.

Acorn

I thought that I had found an alternative YT player that does just that.
Sadly, I found it had porn links for "adverts" but only on my phone as I block such links on my PC with uBlock Origin.
It...