The RV Doctor: RV Awning Canopy Replacement
I couldn't find a good video, but here are the instructions I used to replace mine a couple of months ago. It takes 3 people to do and isn't that difficult. You will need 2 good pairs of vice grips, a drill, silicone spray, rivit gun and rivits. I loaded the instructions on my laptop and had it outside to reference while we did it.
I did watch videos on the slide replacement to get an idea of what was happening.