No. I am talking about really different kinds of portals:
1) Level 33: It is the portal flameboy used here. It is there from the beginning of the level, pushes you if there are enemies left and lets you pass when the level is beaten (okay, the effect is not really clearly visible there^^ See level 0.1 as a better example; 33.1 contains just the same kind of portal)
2) Level 11: It is the portal which he should have used. It appears under certain conditions, does not push you, but lets you pass when the level is beaten.
3) Level 2/3: Doors act just like the level11 kind of portals, but are visible from the beginning of the level and they are often opened by keys (All keys except for three open doors, and all doors except for three are opened by keys... as far as I remember)
So he should have used the 2nd kind of portal, not the 1st one.