I just completed this lesson and also noticed this mistake.
Punishing Bad Openings 3 - Disaster on f7!
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I think it was supposed to say f6 and not e6 since f6 would check whites bishop forcing them to backoff
This is diagram from position on "Punishing Bad Openings 3 - Disaster on f7!" in "Intermediate: Openings" and here after Bxf7 Chess Mentor says:
"!! White sacrifices their bishop to bring Black's king out in the open. Note a move like 5.Bg5 is too slow as Black can play 5...e6 and defend everything."
My qustion is: If white play 5. Bg5 and Black (like Chess Mentor says) play 5...e6 then White can capture Black queen. How is this bad?