A few months ago, I saw this very interesting BBC documentary about the history of Islam, mainly focussing on the origin of Islam and the clash with Christianity, culminating in the Crusades. Presenter is the rather goofy London mayor Boris Johnson. It's posted on youtube in 12 parts, have fun.
Links:
Part 1 - http://www.youtube.com/watch?v=x9_-BeXKRMI
Part 2 - http://www.youtube.com/watch?v=00GNX1NFxAQ
Part 3 - http://www.youtube.com/watch?v=Izd4JFmETRo
Part 4 - http://www.youtube.com/watch?v=qI1A3fZk98Q
Part 5 - http://www.youtube.com/watch?v=RF29b47A7l8
Part 6 - http://www.youtube.com/watch?v=kinNxSkuy8U
Part 7 - http://www.youtube.com/watch?v=32NoME2lKxU
Part 8 - http://www.youtube.com/watch?v=ANEZay-5yeY
Part 9 - http://www.youtube.com/watch?v=mOaT-UT1jCs
Part 10 - http://www.youtube.com/watch?v=KnrWYWVdbwA
Part 11 - http://www.youtube.com/watch?v=OWlD_uTay8M
Part 12 - http://www.youtube.com/watch?v=9LyKjy3x66I
Links:
Part 1 - http://www.youtube.com/watch?v=x9_-BeXKRMI
Part 2 - http://www.youtube.com/watch?v=00GNX1NFxAQ
Part 3 - http://www.youtube.com/watch?v=Izd4JFmETRo
Part 4 - http://www.youtube.com/watch?v=qI1A3fZk98Q
Part 5 - http://www.youtube.com/watch?v=RF29b47A7l8
Part 6 - http://www.youtube.com/watch?v=kinNxSkuy8U
Part 7 - http://www.youtube.com/watch?v=32NoME2lKxU
Part 8 - http://www.youtube.com/watch?v=ANEZay-5yeY
Part 9 - http://www.youtube.com/watch?v=mOaT-UT1jCs
Part 10 - http://www.youtube.com/watch?v=KnrWYWVdbwA
Part 11 - http://www.youtube.com/watch?v=OWlD_uTay8M
Part 12 - http://www.youtube.com/watch?v=9LyKjy3x66I