I enjoyed it.
I find it funny that I actually learned something on the day honoring Clocks, haha. Pretty good quote you included there, it is odd though seeing it come from a Clock though. I liked the animation and I was impressed at the way you made the screenshots of the portal look like a stage too. The music was also fitting as the Clock was giving its inspirational speech.
I didn't think there was much depth into the storyline, it could have used maybe a few more quotes or at least an action by the Clock. I got a somewhat empty feeling after the Clock merely said the line and then left, it seemed like the flash was incomplete. Nonetheless, I still think that it was cleverly done and in the Clock Day spirit. Keep up the good work and happy belated Clock Day!