In this tutorial I run through color correction in, wait for it... Adobe Camera Raw! Which now works with VIDEO FILES through Photoshop. HUGE.
The Panasonic GH4 gives you the most high quality .mp4 files you can find on the market - So rich in color information that Adobe's own 32-bit Camera Raw plugin actually handles it very appropriately.
PS: this even works for RED .R3D files.
UPDATE: For exporting, the latest version of PS CC gives you an .MOV uncompresed option for losless quality!