Agree with alot of the comments about streaming service movies.
Also watch older movies on Tubi. There's a few other free movie apps crackle, freevee, a few others. They usually all have the same selection, give or take.
There's a ton of great stuff on Youtube. Especially documentaries.
Binged on 70's dystopian sc-fi this past week.
Logans Run, Soylent Green, The Martian Chronicles, Omega Man, Damnation Alley, Roller Ball and a few others. Zardoz- an oddly odd and strangely unintentionally funny movie.