No? But it is _fascinating_ who thinks this.
Let's take a very popular site indeed. Google.com. Does it get autoplay? Nope. Why not? Because people keep visiting without clicking on any videos.
If I create a new video site tomorrow, let's say I set up a new music label and the whole site is just music videos for our label's artists. That site will start with zero index value, and visitors will need intent to watch the videos. But visitors who come back dozens of times will be eligible for autoplay, because the MEI quickly elevates for them.
But if Google added that same feature to a new tab of the main search site it'd never get MEI high enough to autoplay because most visitors to this popular site of Google.com don't play videos. That's not what they expect this site to do so it doesn't get autoplay.
Most sites I visit which have high MEI don't even use autoplay, but a lot of sites I visit which have very low MEI do use it (and of course Chrome blocks it on those sites). Both causes are the same - the people giving me quality content are also polite enough not to try to shove it down my throat, and those shovelling everything they can down people's throats don't care about quality.