I have to go with the classic Deck the Halls here - it is all over the import media, but we do not have our own version, so it has a foreign touch, yet I find it puts up a happy holiday spirit. Plus, everything is funnier with talking animals, so here goes:
And well, there is also the... well.. gag dub I already brought up in the music thread a few weeks ago: A take on the christmas carol Gaudete by Potentia Animi.