Still the only legal knot is the uni knot. And after re-read it, it is uni on a bight or a double uni, which totally suck to tie.
In the video it suggest the knot in the video is legal. It is not legal.
The knot in the video may pass pull tests it may be wonderful, but if there is a problem the AMA can back out. Do you want that?
The rule dos not say any knot that passes pull tests, or any knot that can demonstrate 80% or line strength. Rightly or wrongly, it says the uni knot is the only one in compliance.
The word shall means something very specific technical writing. It is not a recommendation or suggestion.
Someone needs to get some good data to the AMA on alternate knots, and get the rules changed.