This is always difficult, de-escalation should be done from a position of safety and not within the range of risk where someone can loop a punch over your open hands hit you in the face. When you mention "folks who aren’t yet at that stage." they may actually be putting themselves at risk by following:
- put open hands up and say you don't want to fight and then try to sneak a punch in.
If you aren't skilled enough to "knuckle up" in a fighting position then you definitely don't want to follow that advice above. If a person isn't "at that level yet" then the best thing would be to disengage. If that person is close enough to have to put their hands up then they should have either been disengaging a few sentences back or they should immediately create distance instead of trying to position themselves for an offensive attack.
The reason I say this, is because EVERY video that I've seen that says, "put your arms up up and say you don't want want to fight" usually is followed by some advanced technique that a lot of people aren't ready for or capable of doing. For example, in the OP video, I don't do BJJ so his whole plan of defense would just get me into trouble and make things worse from me.