“YouTube Embeds are like 1.3MB in size with no shared resources between multiple embeds.”
One YouTube embed costs 32 requests and 1.3MB before anyone presses play. Two cost 2.4MB because nothing is shared between them. A lite-youtube web component does the same job in about 100k and renders roughly 224 times faster. Nothing stops YouTube from shipping the light version. It ships the heavy one and your visitors pay for the bandwidth.