Of course it's normal aeroplane behaviour. Do you think anyine enjoys being strapped in for up to 16 hours straight? No, but we all do it when we fly. Other babies and toddlers travel strapped into baby seats for 12+ hours on long haul. I'm sure they don't like it either, but the difference is, their parents don't just let them run around the plane screaming and climbing instead
I was under the impression that everybody needs to wear their belts for take off, landing and turbulence only. Once you're smoothly up in the air, you're permitted to take your belts off.
Likewise, babies would then be allowed to be removed from their car seat and sit on their parent's knee during these times.
So, forcing this boy to keep his on for 8 hours while everybody else could remove theirs, is exclusionary. Especially if the only reason for it is to prevent him inconveniencing (not hurting!) other passengers.
Nobody on here knows why this family were travelling or what attempts the mum and staff made to placate the little boy between this man's video takes. But i still like to think the mum reacted in the best way she knew how in order to get her child from point A to B as safely and as comfortably as possible. Yes - it seems that she could have communicated better with staff and other passengers. She could have prepared for the flight better by downloading videos or something onto the ipad instead of being reliant on wifi. So maybe this will be a learning curve for her, too.