Hi i have massive Problems to capture these games.
In C&C1 The Video Capture is extremly Slow.
In C&C Red Alert 1 the same.
in Tiberian Sun many thing dont work here in game the build menü isnt capture at all.
Only Renegade works fine atm.
This game sounds way too old (2000 year release). Unless there are some patches that would run it in DirectX mode I'm not sure if it's possible to record it with Dxtory or even other programs such as OBS or Fraps.