It was definitely his first time in the building on video, and it is visible and both hands on weapon. He picks up on his way out. He then goes in again. Unless you can give time stamps and compile something to refute it, this is pretty compelling.
It’s visible well ahead of him, so no. I’m very skeptical of things, and this one had no plausible explanation when reviewing frame by frame. It was already there and clearly a blunder. I think this is why they are going nuts censoring it. I’m not citing a motive, or blaming anyone. Just calling it like I see it.