Decentralized media hosting is probably something a separate protocol should solve really well first. Nostr can be the algorithmic or lack of algorithmic social layer.

Tik tok works not just because of the consumption algorithm, but their highly suggestive capture medium and editing suite. You can byo camera and editing suite, but there is an highly suggestive standard of deliverable. Just offering vertical scrolling video isn’t enough to culturally coerce cohesiveness of the deliverable, and that comes long before sorting them algorithmic.ly