Solution 1:

In CS 1.6 and CS:S you can just use the following console commands(as in this video:

)

Step by step what they say there:

  • Open console
  • Type: sv_cheats 1
  • Type: thirdperson

That's it. There are 3 commands that they also use:

  • cam_idealdist
  • cam_idealyaw
  • cam_idealpitch

From the video I'd say that the best would be to set cam_idealyaw and cam_idealpitch to 0 and cam_idealdist to 50 or 100 or whatever you like the most.

CS:GO

The only thing that I found for it were some youtube comments. They recommend setting both sv_cheats and Cam_Command to 1. But it seems to be extremely buggy.

Hope it helps