Check google maps 5510 Haven street to see the vantage point of the video. It took a while to find it. Now the initial video of the car driving around close to the hotel is pretty much useless but I did find the location and its near the entrance just below the shooters position on the 32nd floor.
The real question is if the shots also came from the 4th floor how did they open the window. Looking at the google maps streetview from the S. Las Vegas Blvd on the same sight-line, zoomed in on the 4th floor, it does not appear to have windows that could open.
The video is bull**** conspiracy theory craziness and there are way too many people out there that will buy into it. Its just flashing lights reflecting off the glass.