There are others such as vimeo. I'm certain if youtube passes off enough people, then a new video site will take over. Tiktok is one of the options but I'm not a fan of them either.
The problem with a site like YouTube is that competing with them actually takes considerable infrastructure. Video takes up a metric asston of storage. It's not something that just anyone can walk in and start doing.
Nah. Tiktok is a social-warfare platform controlled by the Chinese. Governments are finally starting to make moves to ban it from their countries. Tiktok won't be around much longer outside of China.
Tiktok works for the kinds of short semi random content it provides but I got one go to YouTube looking for something specific which tiktok sucks for
Vimeo isn't a competitor to youtube anymore. They changed a bunch of shit in the past few years, they don't want to be.