The voice over helped
Without the voice over this animation would of easily gotten blammed. I like to see educational animation on this website, especially something of this calibur.
It was well set out and demonstrated the use of fireworks in an easy to understand manner.
The animation was fine, though if you want some pointers in that try and make it more visually compelling. Use diagrams, show examples etc... this will further increase the viewers enjoyment of the animation and can give you points for assessment.
I enjoyed it.