That's some exotic looking goat! :)
I really like the idea! The only moment that stood out was the section during x90 and x110. I don't buy how the creature is pushing off and jumping up. I think it's just a matter of leaving the front legs no the edge of that rock so that they function as stabilizer and pushers. Keep them there up until around x100. So it's the legs that push off first, the front legs that keep the balance and start pushing at the end as well right as the back legs catch up.
I think that should work. Maybe do just a quick fix during that part before you continue?