>>40258188Looked into it for you, it's actually a rather clever iframe being embedded into a mod post (I didn't even realize mods had that kind of control over their posts, neat!)
But the thing is that the iframe tag doesn't work as an autoplay method on android/apple, partly due to data usage concerns, evidently
Source:
https://stackoverflow.com/questions/8141652/youtube-embedded-video-autoplay-feature-not-working-in-iphone/8142187#8142187