I think (a) assumes that there is an infinite supply of people interested in watching these kinds of video. In reality, you're going to make most of the money

I think (a) assumes that there is an infinite supply of people interested in watching these kinds of video. In reality, you're going to make most of the money in the first few days after uploading and after that you'll get a trickle of people who find it via search, recommendation or rewatching it from a playlist.