Your vid popped up on my feed, beast! Btw 6... Bf5 was still possible. In shanklands semi-slav course he also discusses the london and typically plays d5,c5,Nc6 before Nf6. Against the kind of tripod structure of d4,c3,e3 he always recommends ...Bf5 before getting the queen out.
FYI, in this position you could have played Bf5. If queen takes you take on b2 and win the rook. Unless im missing something which i dont think i am it works. This is a well known tactical motif in these sorts of lines.
This Game Tactics were a little sloppy is all , also Bf5 is a thing in the start when you played Bg4 , Quite common in London / Slav defences . anyways Good game Im getting used to watching you on a daily basis lol