This is fantastic information and very sobering for those of us with smaller channels. I had 10-50 views per month until two weeks ago and I got 200k views suddenly thanks to the algorithm, but it's already peaked so I expect I can't make more than a few dollars per month. See what happens though!
I honestly have no idea, but I doubt it reached "the front page of YouTube" like the sibling post suggested or it would have millions.
Somehow it must've got suggested to a few people and maybe it had a high engagement rate (likes and comments?) which was somehow taken positively. I'm purely guessing though.
It really isn't an impressive video though it does have a 99% like ratio. I'm a bit embarrassed to self promote here so I'll email you based on your HN profile site contact page.