Don't bother with AMP in adult. Maybe, if you're blogging or reviewing paysites. Otherwise...I've tried, it's pointless. No lift in search traffic. Worse metrics on AMP landers than regular landers.
It was always meant for content sites. You know, sites with articles that people intend to read. News. Blogs.
In adult we need javascript. All embedded players surely require it. AMP doesn't allow it.
this would be good reading for you:
https://amp.dev/documentation/components/amp-iframe/
But it's pointless anyway. Google has basically banned embedded video pages from SERPs (I know from experience, I used to make great money ranking embedded video pages, now its basically impossible).
You gotta rank pages that don't have embedded video players.