Nice youtube of the Foo Fighters Live From the Troubadour For Save our Stages Fest It's an acoustic set with a few stories in-between songs.
Dave is sounding real good. I think the lay off may have helped a lot of artists rest their voices. It's a little over 33 minutes long and posted by the Foo Fighters for the benefit

https://www.youtube.com/watch?v=OUYwH87Y4FQ