Breadtube if it didn't suck.
Post videos you genuinely enjoy and want to share, duh. Celebrate the diversity of interests shared by chapochatters by posting a deep dive into Venetian kelp farming, I dunno. Also media criticism, bite-sized versions of left-wing theory, all the stuff you expected. But I am curious about that kelp farming thing now that you mentioned it.
Low effort / spam videos might be removed, especially weeb content.
There is a cytube that you can paste videos into and watch with whoever happens to be around. It's open submission unless there's something important to commandeer it with at the time.
A weekly watch party happens every Saturday (Sunday down under), with video nominations Saturday-Monday, voting Monday-Thursday. See the pin for whatever stage it's currently in.
Lots of bangers. Uplifting clips of kids seeing through American propaganda, and genuinely heartwarming moments of cross-cultural learning. 
You guys gotta stop calling it RedNote, okay? If we're doing this even partially as an F U to our own US government, you've got to start calling it Little Red Book or just RedBook!
god damn I cannot stand and will never get behind the trend of "video player but with tons of annoying shit on the screen and somehow also barely any user controls"
I'm just being a curmudgeon though, I'm glad people are having fun with this silliness
Are there ads and pop-ups and shit now? Sorry I'm old and I only know how to use Friendster.
it's funny, Redbook's interface is clearly a carbon-copy of TikTok's (which IIRC was a carbon copy of Vine's) but the ads are all "inline" so they don't "pop up" they kinda disguise themselves as regular videos and "play next".
When you realize that you can do a "zoom in" and that makes all of the HUD elements disappear it really improves the experience.