Okay, can you reword that? What is wrong with kids doing squats? If nothing, then, what is wrong with timestamping kids doing squats?
The only thing I see wrong here is the sexualization, but it'd be us doing it if we assume the reason of the timestamp. Compare: Video of people playing soccer, someone adds a timestamp to a part when a guy passes the ball to another guy, would you think the timestamp was created because of sexual arousal and tell they need to see a psychiatrist? How is kid doing squats different?
My problem has been with people assuming a context, and an intent. I keep repeating myself, but a comment on a cat playing with yarn ball video linking to another cat playing with yarn ball video doesn't seem different to me than comment on a girl eating lollipop video linking to another girl eating a lollipop video.
These videos exist, people like to watch them, but I don't see people assuming the intent is for people that have some cat with yarnball fetish to share it with others that do, as the context. Nor were the children eating the lollipops intending for anything else than having fun. There's nothing wrong with either, other that people assuming why people upload videos, watch them, timestamp them, or share them.
But its not just the link, its also the comments that go along with it. One example was "this is why you're here" with a link to a timestamp in the video. That context is unmistakable. There are certainly less obvious cases though.
Please search for my reply on the "this is why you're here" case on this page for more info. Basically, I claim that to reach such conclusions you need an imaginary pedophile in your mind that gets aroused by the material (but not the entire thing, only the timestamp). Then, and only then, this product of fiction makes that context unmistakable.
In reality, I could have in my mind someone that gets aroused by... maraccas (I don't know, it's the most mundane thing I could think of). There's a maraccas video, and there's a comment with a timestamp that says "this is why you're here", so in my mind, there's this group of people that get aroused by maraccas and this comment is for them. The intent and context is clear. All this fabrication is not less real that yours.
Chances are there's a guy out there that actually matches the pedophile in your mind, however, they're not wasting their time clicking timestamps on youtube. If you research porn, people get adapted and need worse and worse things to "get on". The actual pedophile stopped being impressed by such timestamps content long time ago.
The only thing I see wrong here is the sexualization, but it'd be us doing it if we assume the reason of the timestamp. Compare: Video of people playing soccer, someone adds a timestamp to a part when a guy passes the ball to another guy, would you think the timestamp was created because of sexual arousal and tell they need to see a psychiatrist? How is kid doing squats different?