Where do recorded demos go?

Replayable clips recorded using the “record” command in the console stay around even after restarting the game, so I assume they are saved as files somewhere. What I want to know is where they are saved and as what file format, so that I can delete my many test recordings. Also, does recording a demo with the same name as an existing one overwrite it?

They’re sent to your GMod folder, look for the little HL2 Lamada icon, should be there as whatever you named it.

C:/progamfiles/steam(or valve)/steamapps/<Username>/garrysmod/garrysmod/><Demos go here><

Ah, thanks. Then they’d be the DEM files.