Keeping the feel good / nice animation / awesome music theme going following Kat's post, here's a clip for Lloyds TSB:  

There's nothing about the structure of this ad that would necessarily make it into an automatic viral, but it does something special for the viewer. It removes them from the rat-race of their everyday lives, and re-instills a bit of magic into an everyday occurrence.

One can only imagine how well recieved this must be by an office worker, stuck in his cubicle and slogging away 24/7.