Lots of potential.
There is something very depressing about this, and it has nothing to do with the content. This was one of the most potentially amazing things to hit the portal this year. A stunning concept, design, and director's approach with some very very powerful music. So it's with alot of remorse that I say this, but you simply cannot draw or animate well, or if you can, you didn't here.
All the ideas and thoughts were there. The design work, the imagination. All right there. Seemingly though, you never learned how to proportion and lend weight and volume to your poses and characters. The only thing giving the drawings depth was the shading, when ever line should be making a convincing argument for a drawings existence in space. I will say this though, the "Doctor" was very well rendered in comparison to everything else. Rather than rely on processor heavy filters that don't even look that good in the first place, I'd recommend spending alot more time working on your line-sensitivity and variation to convey the characters.
Another thing was the animation. It was very lifeless. The frame-by-frame was watery and didn't convey any sense of muscles or anatomy at work in the characters. They just sort of morphed from pose to pose. Your tweens too were bland, and not well timed or spaced. It's almost always the case when tweens are used by amateurs, but you should always be cautious with them because after just a few frams a tween really reveals itself and becomes a distracting eyesore unless it is very well timed and dynamic. I think you should go ahead and try your hand at some really simple practice exercises getting a feel for weight. Gravity has got to exist, or if it doesn't you need to make it apparent and make a point of it.
Anyway, even as a brilliant and imaginative concept with a mediocre execution, this was a joy to watch, and I hope you'll only continue to practice and develop your skills so that your technical prowess can match your creative vision.