It is hard not to judge when you watch this video. I was alarmed at points that she was going on for so long. But it also triggered in me a desire to know if anyone has taken time to research this yet. She says they have been doing this with their babies for 30 years - I wonder how many have been doing this, and if there were injuries, how the babies responded afterwards, if there were any difference in development compared to babies who don’t have this “treatment”.
It did not look like the baby was crying at all, seemed quite content. But who is to say if that’s not from the sensory overload of being swung around repeatedly.
Perhaps it would help the joints and muscles to be strengthened and remain mobile. I have to say, carrying a child around in a car seat/carrier all day certainly is NOT good for their backs, joints, muscles, anything, and we see it all the time now in our Western society. Some babies are doomed to most of their daytime hours in a car carrier as mother goes visiting, or even at home so mother can just move throughout the house keeping baby with her.
Anyway, these are just my initial reactions after watching the video. There is so little information, just a video and a short article. I couldn’t make a judgement without hearing more about it all.
I would think the baby would have sore muscles/joints after all that.