Kitties and doggies! I just finished watching it and although I was initially a little underwhelmed by the fact that you slowed it down, I think it's actually quite nice overall. At least it's not just a straight cover of it, which would have been pointless. I especially like the new intro and outro!
I hope the other two Beach Boys Christmas songs you covered are "Christmas Day" and "winter Symphony".
edit: I'm in Sackville, NB and it's sunny outside -- not exactly Christmasey yet, unfortunately!