The idea is to play g6 and Bg7 the way to a white advantage was demonstrated in a game by Fischer
He played 4.d4....g6 5.Bf4....Bg7 6.Qd2! intending 0-0-0 and a kingside atack
if 6.Qd2...Qxd4 7.Qxd4 followed by Nb5
Some still play 2.......Qd8 figuring the queen usually goes to a5 then after c6 moves to Qc7 so they just get the queen out of the way early but it makes no atempt at an advantage or equality but it doesnt lose
5. ...c6 was not the best move--better 5. ...Bg4
8. Be3 was a bad move by White--for one thing it blocks his half open e file.
9. ... Bf5 a bad move by Black--correct is Bh5 maintaining the pin.
Bh5 puts on pressure via the maintenance of the pin Bf5 actually relieves some of the pressure and also loses a move as now White has an extra move h3 he would not have had if Bf5 were played directly. In general it is wrong to relieve a pin when it is not necessary.
However at the end--would rather have Black in the Apex game and he is right to state Black may strive for c5 after placing his Rs on c8 and d8
I already think the Scandinavian looks a bit risky, but I don't think this is the intended followup move. Is there something I'm missing?