Matt:
Once, You Tube was quite particular about submission specs. Over the years, though, I think that process has all been automated. Now to the point that it is not unusual for webmasters to put up video, even accept uploads from users. I have been away from FB for so long (It is a current course requirement, so I opened an account,) that I was surprised to see the amount of video activity.
The big hosts are notoriously tight lipped about operating costs. Still, we are told that You Tube, big as it is, still operates at a loss. Normal people can't do that. So, what is taken for granted by You Tube users is negotiable for mere mortals.

Sslechta: That's exactly right, when it comes to You Tube, whose achievements have been amazing.
I'd like to see one of those 4K videos. You are way ahead of me, on that note.

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