A blanket banning of autoplay will be the only solution then. While at it, they must ban autoplaying of suggested videos. Autoplaying of suggested videos is the video site equivalent of autoscrolling.
Yeah, I toggle that switch off every few weeks when it 'mysteriously' toggles itself back on.
I really hate google's YT, they even throw up (the equivalent of) 'buffering' more than it ever did when they didn't have a huge worldwide CDN behind it.