I have to agree it does look like the last Astoria gig. No footage of this gig has ever been released, to my knowledge, but you can find footage of the gig on the 20th December (the day before) on YouTube.
The interesting thing about this is that it’s shot from the side of the stage. If this is from the last ever Astoria gig and the carnage on stage seems to support that, the video was most probably shot by one of the management team. Comparing the shot of James doing his smashing of the guitar and the one of the day before, which is shot from in front of the stage, almost definitely by an audience member.
As I said, as far as I know, no full gig footage exists of the final Astoria gig on the 21st, this clip could well have been one of the management going ‘oh shit, what are they doing?’ and filming the smashy smashy, rather than the entire gig.