Wow, I have trouble sitting through most of those old movies... Good for you however.
Youtube has a ton of stuff.
Like if you find something that you like on Curiosity Stream you can probably find it on YouTube.
Smithsonian is the only content provider that seems like they have some good unique content.
I tried to watch some old sci-fi recommendations on Amazon Prime. Those movies were so terrible they should never have been made. I did see a comical 1950’s nudist movie. Well, a little bit until I saw what it was. It’s amazing what used to pass for Pr0n back in the day. Guys and gals walking around in some rocky forest wearing nothing but shoes. I guess if I was a teenager I’d be impressed...
Smithsonian is the only content provider that seems like they have some good unique content.