I don’t see anything outwardly aggressive in those videos. Though roosters/cockerels that are aggressive don’t always show signs of it, which means that it can be hard to predict. However, I wouldn’t worry about it, just keep doing what you have been doing.
That doesn’t sound like worrying behavior to me.
Here are some pictures (with descriptions) of possible aggressive behaviors and body language to look out for.
These three, two of which were cockerels, would all puff up their hackles and peck, though they never spurred me. The adult rooster...
Assuming you mean behavior towards the other chickens and not you, there are a few things you can look out for. Pulling out feathers and bloodying combs are both ones you probably want to avoid, and may need to remove or separate him if he starts doing that. If he approaches pullets the same age...
Cockerels raised with older hens will eventually be dominant over the top hen, even if this means they have to fight for her to submit. I personally wouldn’t worry about it unless he’s being vicious. I had a bantam cockerel who was generally pretty good with hens, other roosters, and people, but...
Not all roosters will go through an aggressive phase. By an “aggressive phase” I mean a cockerel who pecks at your hands and shoes, not one who jumps at your face to spur you. The age varies, but I’d say anywhere between 3-5 months is most common. However, though uncommon, some roosters will...
I’ve always hand-raised my roosters. In my opinion, if a rooster is going to become aggressive, he’ll become aggressive no matter what way you raise him. It’s just the level of confidence that changes. Maybe he won’t attack the person who raised him in a hands-off way, but he may attack others...