The song itself is quite simply phenomenal, and Finn already knows how much I respect his talent! The background images and animations are also ridiculously impressive.
That said, the character appearance and animation leaves much to be desired, and is quite honestly the weakest part of the presentation. But hey, you're still really young and have lots of time to learn and grow and improve your illustration and animation abilities! So don't give up, and I look forward to watching you improve over time. Let me offer up a few helpful hints:
Really study images of the human body in order to get better at drawing people. While I've certainly seen worse proportions, the male and female within the video are incredibly stiff and possess some very unrealistic features. From the back view, the back itself extends too far upward and almost gives the appearance of having a hump, which I do not believe was intended. Your hands and shoulders are way too rounded; once again, study those aspects and smooth them out in a more realistic way. Arm and leg movements are also really stiff and awkward at this point. And finally, when viewing the head and neck from behind, the neck would continue up past the back of the head rather than the other way around, like it is here.
Having a really amazing song and gorgeous backgrounds boosted my overall score quite a lot, but had I gone strictly by the merits of the characters and character animations alone it would have been a much different story. When those aspects come together in a more harmonious way, you're going to have a seriously killer repertoire. Best of luck going forward! :)