Vegas
VEGAS, more commonly known by its former name Sony Vegas, is a non-linear video editor (NLE) by MAGIX. it is historically the most popular editor for both YTP and YTP tennis.
Notable Versions
As of writing, there are 22 versions of Vegas. However, some are more important than others!
Sound Forge Vegas 1.0
This was the first version of Vegas (not including Betas). At this point, it was only an audio editor.
Sony Vegas 4.0
This was the first version of Vegas with 3D Source Alpha.
Sony Vegas 5.0
This version, along with 6.0, were very common in early tennis. It is still used nowadays to re-create "retro" styles of tennis.

Sony Vegas 6.0
This was the last version of Vegas to (officially) support Wax.
Sony Vegas 9.0
This was the first version of Vegas to support MP4 files, making it ready for the modern world.
VEGAS 14.0
This was the first version by MAGIX, who purchased the product from Sony. It is often considered the best version of the program (citation needed)