I do not believe I read that and I asked a few mods to the forums fofix, but most was not sure what was happening. who has also just heard about it.
But in the midst of insistence and persistence, from fofix themes released for alpha, I and perhaps a lot of people were able to implement their video introductions.

well, but go ahead, the scheme is the same as those of videosbackground.
ie:
1) You take your video, you would like to be the introduction of fofix alpha (1 or 2)
2) decodes the video to Theora Converter.
3) after that rename your video to "Intro.ogv."
4) go in the themes, and in the "menu", there you paste your video introduction.
and good fun!

Note: the videos have no sound or no sound is decoded or something.
Do not know yet explain why, but I think the mods or developers can say something about it.
