The riding on that longer tiny indoor video is pointless and I say that as someone with a fairly large toolbox of things to do at the walk that help engage the hind end. There is no dressage happening there, classical or otherwise. I’ve also rarely seen such un-following hands or seat. Totally inert.
That said, I’m not sure incompetence at such a low level requires the Big Guns to denounce. I suppose the point is more that this person is being an on-line troll. If they just kept to themselves and posted the occasional horse video noone would be paying attention.