Easy way to open a can of worms...
Several of the practices shown on the video might be criticised as not being adequate...but, that said, I have some real problems with the official doctrine, as well as part of the "letter of the law."
I will say that 'anything is better than nothing.' I will point out that, in the days before those plastic lock-out things, common practice was to disconnect the wire from the breaker.
All in all, the clip is a step in the right direction!
