It’s really just an extended music video.
But it was pretty cool.
EDIT: Ok so I just found out that Thom Yorke was the main dude in it. I’m not a Radiohead fan so I didn’t know what he looked like. I legit thought that dude was just a homeless guy that was turned into an actor and not to disrespect his appearance or anything but that was just a surprise to me. I didn’t expect at all for him to look like that lol