I've been searching on youtube for the preview show from last years SCD. I have found some snippets of it but can't find it in its entirety. I've been able to find the 07 preview show and the strictly story doccumentary but am having trouble tracking down the 08 show.

Hope someone can help me find it.

It probably got deleted by the BBC in the mass extermination of videos on youtube.

Have you tried searching for a torrent of the show or the whole series? That's probably the only way you will find it now.