I have some 444 10 bit progressive files, you could argue that the mere act of sampling an analog domain is lossy, but if you accept a typical YUV422 as being non-lossy then I have a fair amount.

But yes you're right that typically video today will be stored in the 150-250mbit range which is lossy.

I imagine a typical youtuber will then compress that again out of their video editor to something like a 20mbit long-gop file and upload to youtube/vimeo. That platform then takes the original upload and makes a dozen or so versions and different frame sizes, bitrates and codecs to cater for different consumers