Playthrough Highlights in Counter Strike: Global Offensive
Playthrough Highlights in Counter Strike: Global Offensive
As mentioned, you can't simply transform Valves game demo files into a video format because they aren't straightforward playback of your player interface. They include multiple players and options like freeview, which aren't captured in a simple video version.
I prefer using fraps or Bandicam, as they deliver 60 FPS or more.