Channel Strategy & Niche
Audience-Market Fit
Also called: creator-market fit, content-market fit, audience fit
Product-market fit, applied to a channel. You have it when a group you can describe in one sentence wants the thing you would make anyway. They come back for the next one. You have not got it when every upload finds a different crowd, or when the audience you attracted wants something you have no interest in producing.
Both halves count, which is where people go wrong: a format nobody watches fails the test. So does one that performs while quietly making you miserable. Sooner or later you walk away from it, and a channel that stops fits nothing. The useful question is whether you could happily make a hundred more of these for the people who turned up.