Yes, it is anime. There are already several hundred videos on this site using it, and many more to come, so don't hesistate to upload yours. It's perfectly fine.
As DJ_Ultima said, Advent Children would most definetly be considered an anime. After all, "anime" does mean "animation" and wasn't Advent Children animated?
Also, there's tons of AC videos already out, so don't hesitate! I'd love to see it sometime!
Final Fantasy Last Order OAV kinda chucks that movie up in there too.
"Strength lies in action. Let the weak react to me..." - Kamahl, Pit Fighter from Magic: the Gathering "That is a mistake many of my enemies make. They think before they act. I act before I think!" - Vortigern from Merlin ('98) "I AM REBORN!" - Dark Schneider Bastard!! OAV