Wait wait wait ... they're arguing that a law can't be enforced at all unless there are specific clauses in it which describe what enforcement of that law is?
If that stands, that's precedent that will make all sort of laws unenforceable.
This is the modus operandi. They do whatever they want right now, with total disregard for law, then hold the ensuing case up in the courts for as long as possible while they lather, rinse, repeat.
Other video demonstrates that he drew his gun before the vehicle started moving forward. Like, fully out of the holster and about four or five inches away from his body.
He also started with his phone in his right hand and switched to his left before he moved in front of the vehicle. He knew full well he was going to draw.
Printed ones are great - I'd never say not to. But cheap whistles bought in bulk are way less expensive.