There is also so much that cannot be seen in the video. If the horse was doing an action that we, as observers, thought looked good but still didn't give the appropriate response that the rider was feeling for, then the horse is still not doing the proper action.
How many of us have ever had someone say to us "Wow, you and your horse looked amazing doing <insert particular move here>" and you just say "thanks" but all the while you are thinking about how the move didn't feel very good because the horse wasn't as supple as you wanted or they felt a bit bracey here or there or they were sluggish to your cues or they were really falling on the forehand or dropping a shoulder into the turn.
I think I have to agree with NRHAreiner and Franknbeans here. While the rider may not have been using the method properly or in an ideal progression, it was a very long way from abuse. In spite of what all those NH gurus out there would have people believe, you can't always just be soft and kind and gentle and nicey-nice to a horse and get the results you desire. Sometimes they need a bump with the bit or a spur to remind them "Hey, you know what you're supposed to be doing, now wake up and do it right". How hard that bump ends up being depends on how many of the previous steps in the progression the horse has just ignored.