Which animated batman series has Jason Todd as robin?

I don't mean to sound dorky or anything but at about 2am in the morning i was watching random videos on youtube and a saw an AMV about Batman: Under The Red Hood and it totally rocked!! since then i couldn't get the movie out of my mind and now i keep watching it over and over again. Despite Jason's violent and brash attitude i really like his character. He was just too cool for words!! He actually outwitted Batman! (still cool even though it was batman who trained him). I really, really, really, really, really wanna know what animated batman series he was in! so help me out please!! Thanks alot guys!!! ^_^