Thanks for the reply. And it's good to think about the niche I'd like to do.
I've been compiling a list of games that I think are high quality, free and usually use pixel art. I listed about 117 games and demos so far and now I'm going through the process of narrowing the list down to the most polished works. May end up going out to find more games after that depending on how the list looks when I'm done.
I think you're right about reaching out to game devs before making the videos and streams. I'll add that as a preliminary step.