My window keeps falling down...video included

[davemchine]

I'm hoping there is an expert in the house. Normally I slide the window up and it stays up. Now it just drops back down. There is a metal coil inside the frame (both sides) that may be the problem but I don't know how to fix it. Thanks for any advice.

https://colquhoun.info/public/window1.mov https://colquhoun.info/public/window2.mov