What are these videos I’m seeing?

Every now and then I see a TikTok post with the song clarity playing, and the video seems to depict some advanced civilization with UFOs and stuff. The only context I get on it is some comments repeating “271k” (which I already know to be the absurd claim from neo-n@z!s as to how many people died in the holoc@ust). So what I’m guessing is that this world these people are imagining is one without “inferior” races, only containing Europeans with desirable traits. Does anyone have any information?