The article didn't have many details about the "For You Page feed algorithm". Any guesses as to how it analyzes a video, and which properties it looks at?
Don’t know much about this, but I would have thought TikTok relies on the watch patterns of its viewers, rather than direct video analysis.
Yeah I'm imagining a mix of facial features, audio/music metadata, and some kind of collaborative filtering between viewers and creators. The vast majority of feeds use at least geography based personalization to give you content in a familiar language, too.
This gives a general idea of how the algorithm works:
Latent visual features are likely a strong component. I imagine if you created a new account and started watching content with only blond people in it, the ranking algorithm would pretty quickly start showing you only blond people.