It depends. But my overall interest is someone's passion for two wheels. They can be talking about anything as long as I know they are loving the ride.
Now if you are referring to stuff where someone throws in a video that has nothing to do with motorcycles, and isn't on a motorcycle, I might not watch the whole thing. Say a motovlogger goes fishing but gets there by cage and then goes out on the boat and never mentions bikes, I may not enjoy that video. Or I might, but if that became the norm then I might not watch as many of that vloggers videos as I do not enjoy fishing. But if they ride their bike out to their favorite watering hole and pull out two or three trout and bring me along for that two wheeled adventure, never talking about bikes, I would be in for the ride and the hunt.