Well you got the different forums and websites like eoshd, cinema5d, planet5d, nofilmschool...where you can find some resources, gear reviews, beginner tips and such.
Then if your interest is broader than the handling of the camera and the making of video i recommend you read Cinematography: theory and practice. It's a great book that will teach you a hell of a lot about filmaking, with lots of examples...
I started reading, jut as you, about the video features of my camera and quite fast got an interest in broader themes related to video. Just surf around you'll find tons of resources about the technical stuff (as FPS and shutter speed for video), and then if you get interested on other things besides the gear related tech part, get the book.
Good luck
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