I don't have videos, but I did disassemble the front window awning
on my Trillium
4500. The four 45 degree cut corners were originally joined by crimping/pinching an L shaped piece of metal at each corner. To disassemble, I pried apart each crimp joint and removed the L shaped piece of metal. I was not able to reuse the L shape piece of metal, nor re-crimp each corner. Instead, I cut four small pieces of sheet aluminum in the shape of a right triangle and inserted one in each corner, on the back of the panel. I secured each piece of sheet aluminum with a few sheet metal screws. That was a few years ago, and no problems.