I watched a few of them. They still have the fundamental flaws of
1) Practicing against a completely incompetent attack and
2) Assuming that they get to execute 3-5 moves while the attacker only gets one.
Many videos have this issue. In the normal situation, when you make one move, your opponent will respond with one move.2) Assuming that they get to execute 3-5 moves while the attacker only gets one.