Here I just show the marine's and predator's weapons in the experimental third person view in the latest version of the MelPyth mod, M5. Just to clarify, I have not used any kind of editing software with a background thrown in. This is an actual multiplayer server in a mod that allows for a third person perspective in-game.
A million thanks to Melanikus for making this available!
This video was recorded with Fraps on a 2004 Dell computer. To get this mod to work properly, you will need an old computer with AvP Gold on it. You can technically install it to your AvP Classic folder but you'll only be able to experiment with the Image Intensifier on because of a graphical incompatibility with newer graphics cards and the old version of DirectX.
The MelPyth mod was made by astro_muppet and Melanikus. M5 dates to 2007 and is available here: Indiedb.com