This is something that I will probably never see in person, because I don't see myself battling the huge crowds at this time of the year. So for many of us, this is the next best thing.
This is a video of the New Year's Even 2012 fireworks at the Magic Kingdom. It looks like this was videotaped from across The Seven Seas lagoon (probably from the Poly?). And from what I can tell, the fireworks also originated from a barge in the middle of the lagoon. This means that if you're at MK looking at the castle, you would have to look behind you to see some of the fireworks. Also, the one that they are shooting off at the lagoon doesn't seem to be synchronized with the audio music. But the ending is utterly spectacular.