On the other thread you posted this clip. Nice clips: looks like good work.
We did this kind of thing a lot too and I've done it in other MA.
Is this a beginners level one? When we did it we did a number of different levels:
1) Like your clip, one at a time in order, waiting till the last one has finished (like a fast san sao)
2) and then we worked it up to the sifu shouting out the number of the attacker (varying it so they were attacking from the left, or behind, then the front etc) so the defender had a split second to turn and adjust to the angle of attack.
3) A later version is calling the numbers and limiting the delay between each one to two seconds, so sometimes, if the defender hadn't 'finished off' the one guy the next guy was on the way in.
4) Calling numbers but the only the attackers know what number they are and they mill around the target.
5) All of them coming straight in at once: defender always gets tagged! He also has to find his way out of the circle ASAP and think about positioning some of the attackers in front of others.
We also did the same drill (all in at once) with the defender only being allowed to use footwork. The only handwork allowed was moving from wu to man or back so no strikes and no tans/paks etc. This is a very effective drill for checking your structure at speed: if you want to/can you make contact with your shoulders/knees/shins/elbows, to try and take their balance (cut straight through them whilst retaining your structure) but no striking. It also really encourages you to stick with your whole body to their centre which is invlauable in cutting the angles (against one) and gaining a positional advantage (against multiple attackers). Anybody else try that?
Also, you say on your clip your guys are using nonWC strikes against the defender, but they're very slow and mostly very unprotected in their centres (not so much techs as wild slow swings!). Do you ever do it at full speed?