This can be added to your game to give you the German videos. If you want to add additional videos for other languages, use the addon-packs. The other...
The Past Ain't What It Used To Be...
The first Command & Conquer received its last official update on the 21st of June, 1996. Since then, the game has been ported to Windows (as "Gold" version), and re-released in the big "The First Decade" collection pack, but has never received any more bug fixes.
The C&C Gold Patch 1.06 project aims at bringing this classic into the new millennium, by fixing the old bugs, supporting higher resolutions, and adding new modding and mapping possibilities. It also contains an addon-based language system, allowing anyone to create translation packs for the game.
After the last release, I noticed in some tests of the new installer that the game seemed to hang for about 5 seconds at the start of every video, and when aborting a mission.
Thanks to talbin on the CNCNZ forums, the cause of this issue has been pinpointed. In the game folder, inside "ddraw.ini", there is an option that says "singlecpu=true". This should be changed to "singlecpu=false". I have no idea how that snuck in there, especially since it is not among the options editable through the configuration tool.
The installers of both the patch and the full game pack have been updated to fix this issue.