A very popular online Christmas card is an animated version of the song White Christmas, from a 1954 (or perhaps ’53) recording by the original lineup of the Drifters. The animation was done by Joshua Held in 2002. This is the video he posted on YouTube.
The YouTube video has better sound than in Held’s original Shockwave Flash file, which has the advantage of better image quality. Here’s the SWF for comparison. Note: Once it starts playing there’s no pause option.