If I remember correctly, Uli's override.dll allows the calling of other DLLs, so theoretically you could use that to implant a open source video encoder/decoder format to use for the animated screens/cinematics.
Uli said:
This client has been modified to load a DLL called Override.
You can create your own DLL's which will allow for further modifications, you can use this to load a DLL if you don't wish to expand the client's free space or searching for free space.
Of course this all relies on the concept that I'm understanding his post correctly.