Definitely AI.
The dog isn't hitting the cones in a way that would actually knock them over.
The third cone falls jumps and falls apart after.
People's reactions are... Weird.
About 5% of the audience is weirdly blurred out.
The sound doesn't really match what's happening.
And that type of a dog agility trial wouldn't have that big of an audience.
Edit: I completely missed the fact that the PVC pipe jumps have no feet. There's no way they'd be standing like that. And those types of jumps also have the bar on pegs so they can fall if the dog "misses" the jump.
One example:
https://clipandgoagility.com/dog-agility-jumps/ready-jump-dog-agility