I’ve squinted at the black mark and it looks like it’s just above the agent’s sleeve and in the lighter blue sleeve on Trump, but I know that digital images and perspective can be a little wonky. About the time of the first shot, his right shoulder lifted up just a little, and about the time of the second shot, he grabbed his ear. No matter what, the grazing on his head tells us that the assassin was all too close to succeeding.
About the time of the first shot, his right shoulder lifted up just a little, and about the time of the second shot, he grabbed his ear.
My interpretation of the video as well.