I think its pretty obvious how and why, every other platform copied the key parts of Tik tok, youtube has shorts, and others have their own rendition. What they all miss is that this IS Tik Tok its not some additional part of Tik Tok. It's a simple UI that gives you endless content you like, they tag all the content in a meaningful way behind the scenes, and then the recommendation engine works to feed you more of what you like.
Pinterest but for short videos.
Turns out short attention bursts is enough for the younger generations, they get condensed news. The big downside I see is they get used to the cut version of things, I am a huge fan of longer videos with raw uncut context, I tire of people telling me what someone said, just give me the video thanks, I can think for myself.