
my hypothesis is that the evenly spaced blips are what the number keys bring you to - pressing 6 during a youtube video brings you approximately 60% into the runtime and so on. im not sure if thats people who are savvy about this and want to watch only ~2 hours of black screen, people skipping thru the video to confirm "yep its actually a black screen," or if it's cats and babies randomly slapping the keyboard
there may also be joke timestamp comments like "wow cant believe what happens at 7:24"
cant confirm either one without seeing it and im on mobile so this is all baseless