The iPad 3 has a pretty decent camera. It does not outperform a DSLR or a pro camcorder but you can take quality videos and photos with it. These 5 video mounts for iPad help you capture better videos and photos:
Makayama Movie Mount: a versatile movie mount that lets you attach your tablet to a tripod. It also supports tele and wide angle lenses, lights, and microphones.
Delkin Fat Gecko iPad Mounting Kit: designed for the iPad 2, this lets you attach your tablet to a tripod for more stable videos.
Joby GorillaMobile Yogi: a flexible iPad stand that attaches your device to any uneven surface. It offers adjustable viewing angles too.
iShot Tripod Mount: it is compatible with tablets up to 10.7 ” in size. It has an aluminum frame and can be attached to any standard tripod head. Works with most cases too.
The Joy Factory Tournez2 Versatile Carbon Fiber Tripod Mount: a rotatable and highly versatile tripod mount for the iPad. It has a flexible carbon fiber arm. It has a detachable protective hard shell too.
If you plan to attach your iPad to a tripod or would like to capture more stable videos with it, the above video mounts can help. They are not always cheap though.