this is why we simply self-host our mp4s w/ <video> tags.
Gmail and AdWords UIs are equally terrible/bloated perf-wise. the plain html version of gmail [2] is still by far the best. for a company that built V8, Closure Compiler, Chrome Devtools, PageSpeed Insights, Lighthouse, etc. they really do a shit job on their own properties. Gmail went from the best in performant webapps when it first popularized Ajax to the worst example of one in 2017.
it's as if Google can't find good frontend engineering talent, i don't get it :/
AMP is not a solution for slow pages, even if it's billed as such to clueless content producers. AMP is a content lock-in and user tracking strategy with the promise of boosted visibility/rank. nothing more.
[1] https://www.youtube.com/yts/jsbin/player-vfleyMpxV/en_US/bas...
[2] https://mail.google.com/mail/u/0/h/1pq68r75kzvdr/?v%3Dlui