The TikTok algorithm is crazy/eerily good. The search is too. There are other cool features like being able to post/tag a video response to comments on your videos, and the ability reuse someone else’s audio to make your own version/meme of it. And the in-app video editing tools are incredible for a mobile app. It’s not like some existing nostr app dev is going to just be able to tack on these features. It would need to be its own full-fledged dedicated app.