Might be the case on the coach side but I think the windows are floor to ceiling overlooking the apron. Also think the bulk of the seating is for the coach passengers some of whom have proper waiting areas which is where the video was shot.
Seems that a temporary exit road is being built from the pay barriers so the walkway from the former short term car park can be removed. I don't think it has been up 2 years. This seems to mean that the subway won't be opening anytime soon as the temporary road skirts the 3rd core and hugs part of the flyover which is far from being completed.