This is Tom Holland's documentary Islam: The Untold Story. Channel 4 was planning to air the program, but after the film was screened, Muslim outrage and threats forced the station to drop those plans. The program is still available on Channel 4's website, but viewing is limited to UK residents.
This is a long, long video about the apparent lack of evidence for Islam in the early period of the Bedouin conquest of the Mid-East. It proves nothing one way or another about the actual origin of the religion, but provides some interesting background on the faith.
Found at Jawa's