27.5MB, of which 27MB is five GIFs. Please don’t use GIFs like this. Use videos: they use less bandwidth, use less power, look better, and annoy your “I don’t want videos to autoplay!” users less.
That GIFs autoplay is unequivocally a bug. Just a well-entrenched one that would take a lot of effort to fix, and no one capable of fixing it seems to quite think it’s worth it.
There are multiple reasons I might not want autoplay: bandwidth or performance concerns, accessibility problems from motion, or even just the simple “if you autoplay, then when I reach it it won’t be at the start of the video any more”.