BBC recently did a program about the career of Peter Sellers. It contains dozens of extremely rare clips from reel tapes records, and early short films. Great stuff from the 60s too, Dr. Strangelove reciting "A Hard Day's Night". He'd earlier done it as Laurence Olivier doing Richard the Third, also included.

Unfortunately, I only got around to listening today and it's already removed as a download. It's still available here, http://huffduffer.com/hickensian/23047 (currently top link, not my site). That will probably get a cease and desist, so if anyone is interested and can't get it I'll mail the file or set up a private server.