I've observed children on tablets ... they will watch the same video north of 100 times ... it's what kids do.
Then you look at the successful youtubers; people who do things like unwrap gifts or who make things I perplexingly am not entertained by. When I put it in the context of "this is watched by 5 year olds" everything makes sense.
I was talking to someone at a company that tracks these things, she said "no, it's actually women in their late 30s and 40s". This is even more evidence. They are on their mothers devices. It's not like women in their 40s are watching 60 variations of '5 little monkeys jumping on the bed'.
Multiple variations of this nursery rhyme have viewcounts over 100 million. (https://www.youtube.com/results?sp=CAM%253D&q=monkeys+on+the...).
I'm waiting for the commercials to be kids cereal and action figures, but somehow that hasn't happened yet. I get a Capital One credit card ad, logged out, in private mode, watching a nursery rhyme video. (hint hint, million dollar business right there).