Lazy load video player scripts for youtube and vimeo. A lot less to load when scrolling in feed and would only load js for player on click of image. The plugin linked below kind of works within buddyboss but a lot of bugs with player being reloaded at heartbeat and a few other things that make it unusable but outside of that it keeps the page lightweight only loading video thumbnail until click. https://wordpress.org/plugins/lazy-load-for-videos/