Did you guys ever use this method?

I'm trying to solve a YouTube mystery, these channels from around 2013-2015 would upload thousands of slideshow videos in the span of a few days and then vanish. This was before YouTube had monetization barriers. You don't see these channels anymore probably because of that. Were you guys involved?
Examples:
https://www.youtube.com/user/addictedaalro136/videos
https://www.youtube.com/channel/UCVJ-zxshTVxtTYntdinLAZQ
https://www.youtube.com/user/addictedaalro136/videos

Bump, we're basically the people behind the channel 'Spam Soundtrack Archive' and we're a group of people trying to make out what the actual hell happened in 2013-2015 and who did it. We had many theories about the thing being just a python script (atleast I had some) but we resolved to one solution.

Any information about the program (or even better; THE CREATOR) will be very helpful.