I hope you don't mind me sharing some thoughts. I don't know how familiar you are with chickens, but I know how much you care about animals and if you weren't aware of these things, then I wouldn't want to have stayed quiet.

I dont know if you've gotten these sexed as pullets, but if not, then you could have a 50/50 spread of cockerels and pullets. The one you are handling at the end of the video looks no more than two months old at the oldest, possibly younger and also suspiciously like a cockerel. The general rule of thumb is no less than 3 hens to a rooster, because any less hens and the rooster can end up killing them with his continual harassment. Even in a big flock he'll have his favourite hens who you can usual spot by their bare backs. Hence the concern if there are too many roosters.