For fun, I went on Google Earth to check the trajectory a bullet would have taken from the rooftop where the lone shooter was killed, and from the water tower where a fictitious second shooter would have been.
Here's the screen grab:

Given the position of Trump's stage with his back to the three buildings, he would have been facing roughly West with his right side facing roughly North toward the roof top and water tower.
Here's where Trump's head was when he was struck:

Given the location and direction the stage was, and the fact his head was less than 90 degrees to the right in relation to the podium (podium was was parallel to the front edge of the stage), it's much more likely the shot came from Trump's right-front direction than from right-rear. His head would have had to be looking behind him for the bullet to graze past his skull if coming from the tower.
It's just not likely that a shot from the tower would have missed Trump's skull so close that it pierced his ear and missed entering his skull -- unless you believe it bounced off his thick skull without leaving a mark.
Just a rough analysis on my part, but it's better than a video (AI enhanced?) showing what might have been Sasquatch climbing a water tower to get a glimpse of President Trump -- the man ... the myth ... the legend!
