RTH I agree totally - I've seen a few dogs go after their handlers because the decoy is out of reach, or the dog is guarding the sleeve after it's been slipped and yea, not something I'd want to deal with on either side of the equation.
I think the grey area we all seem to be going back and forth over is where the line is crossed into inappropriate redirection vs. "puppy stuff" that's not a temperament issue, but a training issue.
ETA: just watched the vid
Looks like you incorporate markers into both bitework and obedience; very cool.
And unrelated to this thread, but whenever I watch others decoy I soooo wish I was big enough to do helper work! Alas, I think I'd seriously injure myself if I tried.