This is solo backing from Creatures of the Midnight (“The way of the Exploding Guitar”). Very nice and mellow track to improvise over I’d say. C-major scale works beautifully over the whole progression.
Tip: If your playing tends to go to much up and down the scale all the time. Or run out of ideas in general. Try to forget the scalar approach complitely. Try singing simple melodies over the tracks then follow with the guitar. Try playing long notes, take breaks, keep it minimalistic. Take it easy!

The actual chord progression: C – F- Am – G  ( I – IV – Vi – V )

Mr. Fastfinger – Creatures of the Midnight – Solo Backing