I'd like to see the video not a still from it. But at any rate the wound seems to be healed in teh second picture. As I'm understadning the story, it seems like this took place all this season. Doesn't add up to me.
Anyway there is no void. A lot of hunters confuse this "void" with a shot above the spine. (of course not in this case).
Believe it or not, the belowdeer was reported to be spined (don't let the front leg forward cloud your judgement, it was hit further forward then it looks because of the front leg), I believe though that it was the lower part of the spine:
Take a look at this skeleton so see how low the spine comes down in the forward portion of the deer and remember that there is about an inch of meat past the upper part of the skeleton: