yep I'm having the same problem, using chrome. I'm about to try with Brave browser. It's been doing the same thing over days with different videos too.

I have a few beers left to drink, so I'm going to test a bunch of browsers, and methods of uploading. I am yet to upload WITHOUT dragging the video in, for example.

Good thing Australian ISPs aren't charging per MB anymore... Or perhaps some are, not mine at least