On the 22C3 Conference Streaming Homepage you can get information, how to receive the audio and video streams of the conference. The audio streams are offered as OGG and MP3. The video streams are being produced in a number of formats. As well, there is a streaming-relay outside, featured by the Streaming Crew of the Forschungsgemeinschaft elektronische Medien (FEM) Ilmenau, which uses the Windows Media Video format. There you can get some videos on demand already.