Nice video!
Regarding what you say at minute 7, I disagree with your perspective. You say that, with non-triangle tactics, there's a 4/9 chance to get double-guessed, while with the triangle ones, there's a 1/9.
If you play only 3 tactics, no matter whether they are triangle or not, there's a 1/3 chance that the opponent will double-guess you. The only difference between triangle tactics and non-triangle tactics is that, when you're not double-guessed, it's always a double mistake in the case of the triangle ones while it is one mistake and one guess for the non-triangle ones.
To sum up, triangle tactics are good for causing double-guess mistakes but are also dangerous, because when the opponent is right, you are double guessed. I used them when I had weaker teams. However, when you are superior and your main goal is not to be double-guessed, it is way better to play 5-6 tactics and make it almost impossible to be double guessed. The price to pay is that most times one of the two GDPs is right (but almost never the two!).