Ummm a horse swishing their tail does not mean frustrating, my reiner did it when she was concentrating. And when he swishes his tail is when he's being asked to do something like use his body, etc. He likes to play and there was another horse in the ring so he was probably a bit distracted. I wouldn't say he's frustrated more trying to figure out what's being asked of him.
And at the trot he's bumping his face down because at the trot he's a lot broker and wasn't really jogging like he can for my trainer :) Not to mention he's bumping with the stride so really all its doing is reinforcing where my trainer wants him to be... you try to sit trot on a strong green broke horse and I'd like to see your hands ;) I know when I sit trot my hands move a little bit, that's what happens when your body is going with the motion. I don't know I wouldn't call what his hands are doing as "jarring" personally.
Just like at the canter you pick up your hands and release to help with the rhythm. He's trying to give the horse rhythm to his stride. I'm happier with him doing that with his hands reminding the horse to put his head down but pick himself over just putting his head down and letting the horse get flat
But everyone see different things different.And its fine if you think that, I just don't see it personally :)
I don't think the trainer is particularly bad, but at that young of an age, I'd rather see him pushing the horse out in frame rather then trying to slow him down already. This is how we create horse's traveling on the forehand.
He's very pretty, but still looks very 'baby-ish'. Nice slow legs.