The 7D also allows full manual control during video to change the ISO aperture and shutter speed settings, but the changes are so drastic during shooting, you won't want to do it. Set the right exposure before shooting. Stop and change it each time the lighting situation changes (i.e. Indoor and Outdoor), although you CAN change it on the fly if necessary.
5D Mark III, 7D, EF 24-105mm f/4L IS USM, EF 50mm f/1.4, EF 70-300mm IS USM, EF-S 17-55mm IS USM, Redrock shoulder rig, matte box & follow focus, Rode Videomic, Zoom R16, Sure PG42, DSTE Pro BG-E11, Excella Neo D400 Studio Strobes, Excella Stardust 50, 580 EX II, lots of other fun stu