Como_estas, I'm sorry but you're part of the problem here.

The "real time version" is the honest truth.

No knife is seen.  No "threat" (other than the officer's) is heard.

You're the one "picking another scenario," not Black Lives Matter.

The footage available seems edited.  We don't have footage from all of the body cameras.  Is it simply a coincidence that, out of the last twenty shootings of unarmed blacks, the only one officer fired and charged was the one caught dead to rights on third party video?

He claimed EXACTLY what these officers claim.  But the video shows him shooting a black man in the back and planting a taser next to the body.

Now, that's "the real time version."