I think you're going to the right direction!
I think theres something that can be done with editing. Mostly some bit weird changes from cllip to clip. But nothing to burn your house down for. You have a calm and clear voice which i think makes at least 1/3 of game videos. So i think it will be good!
And it's hard to tell so much about War Z yet. As you said, so many things that are not yet implemented.