i would like to know if this build is good for High definition gaming and video editing. http://pcpartpicker.com/p/2lUHh
Video Card : Gigabyte GeForce GTX 760 4GB Video Card or
Gigabyte Radeon HD 7970 3GB Video Card?
People often seem to like hyperthreading for their video editing, so I might recommend the i7 4770k instead if you can afford it. However, depending on how much you edit then the 4670k might do just fine. For the tiny amount that I do the 4670k is more than enough.
This build will do better for editing thanx to the Amd 8-core Cpu, but also better gaming performance because of the jump from a 760 to 770 video card. Better quality Psu than what you had listed, and faster Ram(1866mhz). Less money overall too.