> To make the excercise more interesting now multiply whatever result you got by the number of videos your platform is supposed to host.
Multiply income by the same amount though.
> Also assume that some users will want 4K.
I wouldn't assume that for all types of content anyway, and certainly not for all connections. In this case, that some users don't get what they want doesn't matter to those who don't want it. Whereas YT censoring things can turn off even people who aren't interested in the censored content per se, on principle, I doubt you'll find that with "not supporting 4k, because you only got started self-hosting and making ends meet". People sometimes are supportive of people in ways they aren't of companies.