Your new videos are very explicative (like before) but the quality is better and with a lot of humor.
Your theory is no the same as my teacher (he says “play on the air”. I don’t understand that. He says “makes more pression to go high” but he can’t says how? He says not to modifie the embouchure. The air is only the key! But for me unfortunately it doesn’t work!
So I’m going to work on your course seriously and i will see if it works.