The part where Jeremy Brett's portrayal of Sherlock Holmes is discussed in BBC4's 'A Study in Sherlock' documentary. With comments from Edward Hardwicke and Michael Cox. The programme also 'played the game' as 'Dr. Watson' narrates -_^
Well I made the Holmes videos myself and I do have other Brett interviews, some have been uploaded to Google video, so if you search that you should find them. I orginally got them off ebay. I'm not sure I could upload the whole documentary here but I might be uploading it to megaupload, where it can then be downloaded more easily, as opposed to a torrent.
I've tried posting the link into a comment but it never shows. If you go to the box where it says what the video is about (top right) and click 'more', it should be there.