Premier Pro CS6 is not displaying video. Loads and plays clips with sound and all monitors work but no video displayed, installs them in timeline, exports - just does not display video in program or preview monitors nor will it scrub in the thumbnails (static images only). Just started all of a sudden for no apparent reason. All valid file types, even previous projects that worked fine before display no video now.
Moved from the Creative Cloud to the Premiere Pro forum. They will be able to help you here.
I was able to determine that the problem was with the video card driver (NVIDIA GTX 580). While video files played fine on all other programs including Encore, After Effects, Windows Media Player, etc., uninstalling and reinstalling the video driver (with the same version) fixed the problem.
If you are on Windows it HAS been known to happen that a Windows Update will cause a video driver to have problems (more information when you ask a question is a good thing http://forums.adobe.com/message/4200840 so people will be able to help)
It is "more usual" to need a video driver update, so good to know that a simple un/reinstall worked for you