Thanks! I'll try to play around with it a bit. This post is by far the longest of mine so far so it's a good stress test page.
Hold off on loading and playing the videos until they are visible: https://web.dev/lazy-loading-video/#video-gif-replacement
Automatically pause the video when they are scrolled off the screen and no longer visible: https://benfrain.com/automatically-play-and-pause-video-as-i...