Somehow, Vimeo seems a very sympathetic company. I know it’s just a perception, but this news is nice to hear. Perhaps they can pass on this positive vibe over their acqusitions.
In the case of games, the issue might've been IP and fair use. "Not art enough" in IP law means you might not be able to pass a fair use lawsuit for it.
Edit: found https://help.twitch.tv/customer/portal/articles/2577667-vide... which seems to indicate that you can upload video, but it seems to be rare on the platform compared to their bread and butter livestreams.
* It's simple and clean and not spammy. It does what a video player should do - play video - and not much else.
* The artist crowd who truly care about their craft post their content on Vimeo. Thus the content I watch on it tends to be of higher quality and I may be subconsciously associating that with Vimeo itself.