New Year's At the Needle 2010 (Vimeo link)
I'm going to guess there was a lot of this sort of thing done around the world since gathering in groups is out but this one is in my neck of the woods and I found it very fun and inspiring. While I really wish a display like this could be done in real life (wouldn't that be jaw-dropping) I still absolutely love it as a blend of video and effects.
I hope someone finds it as inspiring as I have. Makes me really look forward to the VFX tutes that CGC has in store for us in 2021!