I was at the Vancouver show last night and I think it's pretty set in stone that this was filming for the DVD.
They had big screens set up showing video of the show, and judging by the variety of camera angles and the way they were being cut, it looked like they had a full crew out shooting for a DVD.
Also, those of you who were talking about how you wished the DVD would be from Wembley because of more songs, Chris confirmed that they are filming both shows in Vancouver. I don't know if tonight's setlist was the same, but if they played a different setlist then you may get the additional songs you were hoping for.
All in all, the show last night was the best I've seen in Vancouver, and I've been to many. The crowd participation was phenomenal and it made a HUGE building that I've been to countless times seem like a small venue.
If this is indeed the show that gets on the DVD, everyone is in for a HUGE treat.