I did use your video and it is excellent. my concern is he shows raising the lower window all he way up to make it possible to remove the side plastic panel. When I looked at where the 2 plastic panels meet, they meet about 12 inches above the highest point I can raise the lower section to. See photos attached. So it appears that I would not be able to remove the plastic track without breaking it?
I think I may have a solution for you! From what I remember, removing this kind of track can be tricky. The first step is to remove the screen. Then, you should remove the bottom screw on the track. Pull down the top sash and then remove the top screw. Now raise both sashes and start pulling the track out from the bottom by gently bending it out. I highly recommend that you do this on a warm day, or use a hair dryer to slightly heat the track to prevent it from cracking. Let me know if this advice has helped.