To me she looks lame on the front end. Notice how she rocks back to put more weight on her hindquarters when she stands still. This is particularly evident at the end of the video. I don't know of the horse is laminitic, sore footed or what, but she looks like her front feet bother her and she is trying to get her weight off of them as much as possible. She also has a bit of a limp at the trot.
So I dunno. They go through all this stuff showing how great she is and all I see is a sore horse. It's like they are clueless that something is wrong. :(