You can montetize your videos with ads, and every time someone watches an ad, its about 10cents. You either have over 1k+ subscribers on Youtube to monetize videos, or you must be a Partner with Youtube. Both very easy ways to set up a good channel and make some extra money.
If you have enough subscribers, there are two options. Either get private donations through patreon for example, or monetize through YouTube which gives you a small share of advertising on your channel.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.