It is awesome
"Any 'flaws' you may find in the video were done intentionally and add to the effect of the video."
I've never heard such a pompous statement, but am gonna assume its partially tongue-in-cheek.
I love the synching of events to the pacing of the music. The speding of the running, bag bit, flying bit etc. etc. were all timed brilliantly.
Also, the actual event and happenings were imaginative, continually surprising and wonderful to behold. I love the incidental details when the full rainbow is first revealed.
Loved the colouring at the start - brilliant shading on the leprechaun dude.
My only real criticisms would be the few graphical imperfections - I'd have liked to see some more shading throughout rather than their faces being a solid colour for most of the animation. At one spot the rainbow flickers for a few frames. And when the darker-skinned bespectacled dude passed the other guy, his head flashing in/out of the frame does look odd and slightly glitchy. Like maybe having a frame with his head on a lower opacity instead of nothing would have lowered how it seems to flicker.
Anyway, it is awesome and I love the message delivered by the ending, when he pauses a few metres from the finish.