Since early in the Quake 3 life, some people wanted to enhance the movie making process by modifying the demo playback, adding some features, keys and controls to facilitate the job of movie makers.
In the past, there were Seismovision to play demos, and Q3 Server Demo Center (small description here) to record a server-side demo, containing all the informations about all players and objects in the match, to reproduce them faithfully during playback. The problem with the latter is that you needed a special server mod and binary so the server demo recording could work.
Now time has passed, and new tools are available.
With CPMA and Excessive Plus, you've got the option to record what we call a "multi-view demo" (or MVD), directly while you watch the match yourself as a spectator. With these demos, all players and objects infos are recorded, and you can replay the demo just like the match is happening before your eyes !
But what about recording a movie ?
Here you've got the Quake 3 Moviemaker's edition (or q3mme), a great tool that is similar to the old Seismovision, with many more features ! Amongst them, the possibility to watch MVD and cycle through all players, and you can go back in time if you miss a superb shot !
An interesting discussion about this tool on Excessive Plus forums :
If you are interested into making movies, this can be a really nice tool !
Only potential problem : I don't know if it's possible yet to use it for OpenArena, but if some of you are really interested, we could ask the Q3MME authors to make one, or I could take a look if I can hack it to make it compatible with OA.
It's up to you guys ! Post here if you ARE interested !