Agree pony is irritated and rider has an oddly clenching seat.
Newbies get impressed with tack free riding. Thing is, by the time your horse is halfway schooled it’s already going about 75 per cent leg and seat aids. A good jumper, you look to the jump and turn off the outside rein. A dressage horse, you half halt with weight cues. Etc.
So in a safe space and with no other calls on the horse’s attention, most of us could drop the reins and get our horses to walk halt turn on seat aids. And/or voice commands. There are much better demo videos of people doing this with a more relaxed seat and horse
There’s no way anyone is going for a trail ride doing this. It’s something you try out in a pasture or arena, a place with limits.
Anyhow this pissy horse and clenched up rider are actually lower caliber tackless riding than most of what I see online.