I want to start posting some TF2 demos so I figured I would put up a quick how-to on recording and viewing source demos. This is mainly geared towards TF2, but the rules apply to every source game.

• Enable developer console must be enabled. (Options > Keyboard > Advanced >Enable Developer Console)

• Install demos in your TF folder (Typically C:\Program Files\Steam\steamapps\steamusername\team fortress 2\tf)

• Use the console (~) to use the demo command.
• Use the command demoui and select “Load”

OR

• playdemo demoname.dem will play an existing demo (which must be loaded into your TF2 directory as stated above)

• record desireddemoname will record a demo while you’re playing

Easy peasy lemon squeezy