I don’t think the second part where they fly off the cliff is real one of the goat is clearly flying for 100m

That's normal for a mountain goat. Not 100m, that's probably just perspective from the fish eye lens, but easily 20 or 30 meters. That's how they get down from the heights. And sometimes they die when they trip because they're going pretty damn fast. It's like how when you run down a hill you feel like you're flying, until you aren't.