Caltrop Network Demo Archive
Demos are recorded by the server and saved as follows (times are in EST/EDT):
auto-{date}-{time}-{map_name}.dem
Demos are sorted newest first.
How do I use these?
Save them somewhere (I suggest <your game folder>/demos), then open the dev console and type demoui, then click Load.
See the Valve dev wiki page for how to control and edit these demos.