Here's an old post from a security researcher that wrote papers on this topic, and also experimented with buying votes:
https://www.reddit.com/r/netsec/comments/38wl43/we_used_sock...
I am unsure what the current field is like.
Before ever being a submod anywhere, I had no idea of half of what goes on in reddit.
Then they upload the video, which Reddit loves because it is watching someone else possibly make an error thereby making the viewer feel better about themselves, and then they get an opportunity to share a link for the horn in the comments when people (or maybe the original poster’s alternative accounts) inevitably ask where they can also get a horn like it:
https://www.reddit.com/user/Muscles_Metal_Miata/
I do not see what other explanation there could be for why a person is recording and uploading so many incidents of the same type within such a short timespan.