I have no idea what he is saying, but this video was 2 years ago, so Toto was only 7? Clearly he is demonstrating (either on purpose or just as it happens) the forward correction. The horse is not “corrected” for breaking gait on the extensions at this level, it’s just repeated until it’s done right. He also does the very beginning with the loose rein and sharpening to the forward aids (ie, small aid, no response, so “shoots” him forward but does not “stop” that forward with any reins).
The amount of deep you see at least in the first BTV is not any more extreme in time or degree than I saw at the show this weekend. Not saying this was necessarily done on purpose at the show, since I only pay real attention to what I am doing and I did not watch the whole video.
