I just found the Politzer book on invidious (posted by Marxist Audiobooks)! It’s over six hours, my worry is that YT will break invidious again, and front ends are dwindling, understandably, with the cost and risks that come with the project. Do you know of any backup sites in case the worst happens with invidious?

ETA: the one posted in six parts on the Communist ASMR channel seems better, so far. It actually has inflection, whereas the other was in a monotone.