While it doesn't change the point of your comment, I saw a different ironic thing: how can people even think they can sell videos on-line and capture most of the viewers?
It's like The First and Only Iron Law of the Internet: if you post it, it will be copied and it will be distributed free. I understand that movie studios or record labels may be doing stuff the way they were always doing stuff, but an individual, especially a tech-minded one, expecting to earn money on selling videos in XXI century? Seriously? I mean, you can have any business model you like, but the real world is not obliged to comply.
So that's practical point - you don't get to set up a permanent passive income for yourself just because you publish a series of videos. Some people like to believe that (I've been personally convincing one such person recently to stop thinking along these lines and instead treat educational videos as a loss leader, and use those to sell webinars and/or personal tutoring instead). But I have also a general point to make:
In general, for some reason people imagine that just because they make something and start to sell it, they get to have full control over its life cycle. They don't, they never did. If you make a new widget, it'll get cloned by your competition. If you try to prevent it with $RANDOM_LEGAL_QUIRK, the Chinese will clone it anyway and good luck chasing them down. It's how it was since the dawn of time. And it's good, that's how stuff is supposed to work - this way new things join the shared wealth of humanity.
You're not entitled to capture all value from what you make. You get to only capture some. Expecting more is just plain, textbook greed.
And as a society, we should be nice enough to ensure you're capturing enough value for yourself.