I can't view the video either so I don't know about that. However there was a mini that got a prosthetic (different from the one this horse has) and it could run around with the best of them if I remember the article correctly. Not sure about rolling or bucking though. This horse however they only mention that she can walk/trot. This would be my problem too. I would love to have the money to save my horse if I could because she is my best friend, but at what price would it be for her? They can't guarentee that their quality of life is going to be good. And then there's the long recovery process and in the end I think for most people it would just be better to put them down instead of risking the surgery not going well and having to put them down anyways. Without being able to see the horse move or not I can't really comment on how comfortable it is, but it did say they still used her for riding, just walking though I think.