The experiment has also been brought to the 21st century and its video and audio codecs: https://www.youtube.com/watch?v=icruGcSsPp0 - uploading a video 1000 times to YouTube.
back when i worked in a VHS dubbing facility, we'd get bored and do stupid stuff like this taking a master to VHS, then using the VHS as a master to make dub of dub of dub. after the 8th dub, it was pretty trash. Similarly, we'd take a video in -> video out to another VCR -> video out cascading down until the original signal to the video in of the last VCR was trash. (the place was wired correctly with proper video DAs. we did this because it was 3rd shift and no supervision)