If you think that is definitive proof you clearly don't know what proof is. It is MORE likely that the video you posted is the one that altered the image - not Fox.
Fact is, in the immediate aftermath of the Fort Hood murders people flooded away from the other networks to Fox News because they know it is where they are going to get the real story instead of the watered down, blame America bullshit the other channels put out.
I know you kids love to rebel against us grown-ups but the fact is Fox is the #1 cable news channel and it is CRUSHING the competition. And no, it isn't because all of America can't think for themselves, it's because thankfully most Americans still have their heads on straight.
Go flip through the channels and see what other networks are saying about the MUSLIM who shot up Fort Hood. They are trying to blame the Army claiming they have inadequate means of dealing with post traumatic stress - despite the fact that they guy never saw combat. They are looking for every bullshit cause they can find in order to avoid the issue of Islam. Of course Fox, being a real news agency, began discussing it immediately.
Now who is biased, the guys who ignore and avoid the fact that the guy was a Muslim and possibly demonstrating radical views or those who open the floor to discussion of this obvious fact?
Sure, ignore the guy's Muslim views and discuss how the Army may be at fault - that is objective journalism. Yep, in a pig's eye.