Rabbit hole

Once someone finishes a video, the Up Next panel and autoplay offer more of the same, and a curious viewer can spend an hour working through one subject without going back to the homepage. Suggested recommendations weight videos that people commonly watch together, along with recent watch history, so tightly related videos tend to follow each other. For a creator that is the argument for a coherent back catalogue: if your other videos are the obvious next thing, you keep the session. The word carries a darker sense elsewhere, usually about extreme content. In creator analytics it describes nothing more dramatic than a viewer going deep on one topic.