This is cute and funny, and not too bad at all. Because you're asking, I'll give you my critique.
The biggest problem I see is with the audio, for a couple different reasons. First of all, the voice recordings are a bit rough and I can hear background white noise, which is a bit distracting. But that's more of a minor gripe. More importantly, you miss your audio cues quite a bit. What I mean is, there's too much of a gap between when the characters speak, which makes it feel unnatural. It also lacks sound effects, so for example the bunny is hitting Santa, there's no sound of him connecting, which from an audio point of view makes it seem like he's swinging in thin air. The voice acting was decent however, so don't worry too much about it.
As for the art, the biggest problem I see is with your layouts (backgrounds). They lack any understand of perspective, which isn't too terrible if you're making animations for fun, but if you want to improve, it will be one of the things you'll need to learn. There's lots of different free guides online that teach 1-point, 2-point and 3-point perspective, and just a basic knowledge would help a lot and wouldn't take you too long to learn.
Anyway, hope that helps you for your next video, hope you keep making them. But this wasn't a bad effort at all, so keep it up and you can only get better. ^^