I thought the video was made at St. Florian, but that the audio was a studio recording from the Musikverein. It doesn't sound live. I'll check it tomorrow.
As for the Zero and double Zero, DG did make a 'zero' symphony with Barenboim/C.S.O. However, that's certainly not an issue with me, as I don't feel the early Bruckner symphonies are anywhere as musically strong as the later ones.