A long review
Ok, I don't want to seem like I'm ripping into you but you could have a rather good video if it improved drastically in a few areas, so this will probably be a bit of a lengthy review. (A tl;dr response is perfectly understood.)
First, sound was good, great quality, pretty consistent volume and matched up well with the animation. The animation quality was decent, smooth motion when it was there and matched up with the sound well.
I will say however, that there were a few big problems with this.
There were various elements that I felt were meant to elicit a sort of knee-jerk positive response from me, such as the inclusion of Michael Jackson and Bohemian Rhapsody. I always feel that these pieces of pop culture are included as a fail-safe just in case I wasn't enjoying the video for what it was without them.
As far as style goes, I;ll just say it may be helpful to refine the details of your drawing style, since although much of it was OK quality there were a few points where I was confused about just what was happening. (For example, in the beginning when John rested his face in his hand.)
As far as story goes, well... there didn't seem to be one... I didn't understand what was going on other than a rough parody of "A Christmas Carol,' and the lack of central theme and plot combined with the strange flow of events made it very difficult to stay interested. There were some neat visual effects, but I think they would've done better if there were a more compelling story line since the purpose of these effects is to put the viewer in a mindset that is appropriate to the mood of the film.
Last thought: try to go easy on the "random" breed of humor. If used with skill, it can really add to a whimsical story. If used excessively however, it makes for a jumpy story that becomes boring. ;)
Sorry to review your eyeballs out, but I had a lot of criticism to offer! Good luck, and keep up the good work. Hope at least some of this was helpful. :)