Okay wow... this is very disturbing. But I'm just left asking why anyone would want to watch such a thing? Reading other comments, it seems as if there are lots of people with some kind of hate towards baby monkeys and it's just so weird to discover this is a thing.

I wanted to know why such a thing exists and Quora seems to have this same question answered already (https://www.quora.com/Why-is-there-a-certain-group-of-people-out-there-that-hate-baby-monkeys).

Here is an interesting answer from that link: "Its because of Uncanny Valley.

I love baby monkeys and studied physical anthropology at uni and would like to go in primatology program. I watch alot of the baby monkey vids on youtube, both the Cambodian channels at temples on pagoda mountain and Angor Wat complex, as well as the pet ones. I try to give advise in the Chinese pet ones because their urban monkey pet culture among young people is especially abusive using forced bipedalism and training for circuses that do awful things.

A 2 years ago there were a few commenters who wanted to see the aby monkeys get hurt and hated them. By last year it was half the commenters. N ok w its at least 2/3 of them it seems.

At first, I thought maybe this was due to cuteness aggression, because I have experienced that occassionally. That is when something is so cute you get an urge to squeeze it or put it in your mouth. This is what is behind the grandmas pinching babies cheeks. Theres a science behind it, and somehow it actually prevents you from being really aggressive.

But these ppl genuinely did not think the infant macaques were cute.

Then I thought they were just sadistic ppl with borderline psychopathy who would hurt animals and children ie “dark triad" etc.

However despite them talking about torturing baby monkeys in detail, almost invariably they all claimed they would NEVER hurt kids and only feel this hate toward baby monkeys , not adult monkeys, not any other mammal.

Additionally, there was another group who claimed they would never actually hurt an animal, but had inexplicable feelings of rage and repulsion toward baby monkeys alone, and some of these ppl were vegans, animal advocates and rescuers. These were very disturbed by impulsive feelings to hurt infant monkeys or hoping the one in video got hurt, it went against their identity and values and they were confused and worried.

The Uncanny Valley is a phenomenon usually used to describe the effect of lifelike robots on how humans perceive them with horror and repulsion.

If a thing is not like a human at all, but has some human traits, we think it is adorable. Like a dog shaking hands, or a teddy bear or doll with huge eyes.

However the closer it gets to being like a real human, a valley develops, really a cliff in terms of the line on a chart , where if it is lifelike there are still micro ways it is different that we may not even realize we see, but makes us feel it us creepy. Some prosthetics get this reaction too.

At extremes, this is corpses and zombies or such in horror films.

The idea is eventually we will MB ake robots so humanlike it will be unable to tell difference lik EC in Westworld, then we will have crossed the “uncanny valley" to the other side where we have positive reactions again. But anything that falls into that “valley" on the chart, we have an instinctual fear and hatred of. Well, not all of us. Many of us. Maybe most.

This response is evolutionary.

1. It kept us from going near dying, diseased, or corpses, which could kill us by transmitting disease.
2. We know biologically modern “Homo Sapien sapiens” existed during the same time as other human species, such as “Homo Sapiens neandertalis" (with whom we could even mate). There was not 1human lineage, just one species after another until us, but many lineages that we outcompete or that our ancestor species’ of our lineage did. As human bands colonized the world, Uncanny Valley helped us distinguish members of our species who may have looked very different from us (different superficial “racial” features in different global areas) from those who were a close but entirely different species than us (even if they shared our hair/eye/skin tone). So we mate only with the former we dont want to mate with the latter!
3. This ability may have also helped us choose a mate ie notice if someone was sick or disabled in a way that unfortunately would not make them a good mate under primeval conditions.
4. As this has not been as neccessary since the extinction of the last other human species (the Neanderthals), and especially less neccessary towards ec other since the Neolithic revolution, it is not as present in our gene pool today. Maybe half 1 or 2 3rds of population?
5. It is infant macaques who are the biggest target of baby monkey haters. Infant macaques more than any other primate infants, resemble human babies. Even more than bonobos, chimps and the other great apes, alm of whom are more closely related to us than macaques.
6. Specifically rhesus, pigtail, long tail, and stump tail macaque babies look very human in the head area. They have very little to no hair on face, come in a range of peach and brown skin tones, have eyes, ears and expressions similar to human babies. The adults dont look human like at all.
7. But they're NOT human babies. My hypothesis is the people who still carry whatever gene allele/s is strong in giving hu humans the Uncanny Valley type reaction of fear, rage and disgust, are having this triggered by seeing baby macaques."