Found it, it's nostr:npub1nmq83muu5v0phkaew96amcwtqzle7u39ummz9nxg6dnnqt3zqjtse7vt4s. When you inspect the source code, you see the videos are embedded from archive.org
Discussion
Not my uploads, just to be clear lol. Merely curating a collection:) but thank you.
Kinostr.npub.pro displays it somewhat better, especially on desktop with genre tags as menu
Ditto.pub is also very good as a client, it shows you the embed URLs;)
Tagging nostr:nprofile1qqstvak76lrk34n2w4a289nmzfpajzl40tasn5gyf5epnkx5ynj2agqpz4mhxue69uhk2er9dchxummnw3ezumrpdejqz9mhwden5te0ve5kcar9wghxummnw3ezuamfdejsz9nhwden5te0dehhxarj9e3kz6rvv4hzummjvuvtwkfg as he seems to have looked thoroughly into video options and may have advice re: original question. I believe he self-hosts(?). He may have tips and other ideas 🙏
Also, not a nostr client... but free: