I have 4 young kids and really appreciate this video. My wife and I have tried to teach each of them to swim at an early age because drowning is SO SILENT! Once we were at a local park lake with my daughter who really young. She was in like 1-2 feet of water, and we were both within 5 feet of her watching as intently as possible. Suddenly a little girl playing next to her said something like "are you ok?" which made us look and see our daughter's face was underwater and she was drowning. The whole thing lasted like 10 seconds, but it was still really scary. I think we would have seen in time regardless, but the fact that we were trying to watch so closely and almost missed it was crazy.
You also have to be very careful when multiple kids are in the pool. Sometimes a kid who is a great swimmer can drown when another kid starts panicking and climbs on top of them to stay afloat.
Second on the "good swimmer drowning" part. I once swam in a pool with a few cousins of mine. I was around 18 and just finished a life guarding course at school. One cousin was around 11 years old.
She was panicking next to me in the pool all of a sudden and climbed on top of me. She wasn't heavy but her human effort to grab and exert pressure to use me as a float to stay above water forced me under. It was hard to get back up for air, and very sudden to which I didn't have a ton of air to begin with.
I remembered training, which was to pull the victim down with you to short circuit their brain into letting go, and it worked. I was able to swim out from her area, surface, catch a breath, and go help her to the shallow end.
"I remembered training, which was to pull the victim down with you to short circuit their brain into letting go,"
That's exactly how I was taught as part of lifesaving training along with the most effective way of swimming (and 'towing') the person to safety. BTW, that was many decades ago (presumably things haven't changed much since then).
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I think its that most animal bodies are horizontal and thus float in a way that makes it trivial to keep their heads above water; in contrast to humans which have a bodyplan that requires constant stabilization to stay vertical, both on land and in water. It's the same reason baby animals can usually start walking minutes after being born while human babies require months to learn how to stand and walk in a stable manner
Some species like proboscis monkeys and crab-eating macaques know how to swim instinctively but most primates need to learn either through mimicry or trial and error. A lot of them try to avoid deep water even when they can swim (that's probably more a function of predator avoidance though).
I don't think humans are really bad at swimming, we just panic and splash around instead of kicking our feet like any other animal does.
Human babies can swim, kinda. But the instinctive version of swimming that comes preinstalled in our brains is not like riding a bike. It's something that we forget how to do if we don't practice, and then we have to re-learn it.
You also have to be very careful when multiple kids are in the pool. Sometimes a kid who is a great swimmer can drown when another kid starts panicking and climbs on top of them to stay afloat.