There is a version of Michaels where the opponents open in a major. In that case, the cue bid promises 5 cards in the unbid major and 5 cards in one of the minors. The HCP in that case is 14+ if vulnerable and 10+ if not. The theory is that the preemptive value is worth messing with the opponents' bidding when not vulnerable. Down 1 or 2 is better than letting opponents make a game.
At 12:30, why would you bid 4S instead of 4H? Maybe just a mistake in the video?
There is a version of Michaels where the opponents open in a major. In that case, the cue bid promises 5 cards in the unbid major and 5 cards in one of the minors. The HCP in that case is 14+ if vulnerable and 10+ if not. The theory is that the preemptive value is worth messing with the opponents' bidding when not vulnerable. Down 1 or 2 is better than letting opponents make a game.