I couldn't find the video at the Austrian border again on the BBC News website, which is where I thought I'd seen it, so I tried searching under keywords like "Austria" and "Ode to Joy," and I found this flash mob instead. It was put up by Evenord-Bank eG-KG, a co-sponsor of the event featuring members of the Hans-Sachs Choir and Philharmonie Nürnberg.
It is utterly charming, especially the intro. If I say any more, I'll ruin it. Just watch.
Flashmob Nürnberg 2014 - Ode an die Freude