Doctor Who Confidential - Extended Matt Smith Interview
This is an untouched webrip from the BBC's website.
If you live outside the UK, you're probably being blocked from seeing it.
The format is FLV, which is Flash format. There's lots of ways to view it, VLC being the easiest. Here's a thorough guide if you want to know more: http://www.afterdawn.com/guides/archive/how_to_play_flv_files.cfm
I won't provide tech support for playback so don't ask.