This is worth a look (complete with an English translation over-dubbed). To skip the advert at the beginning, click the small cross on the top right-hand corner:
http://www.dailymotion.com/video/xhbwlo_the-organ-at-the-basilica-of-montmartre_travel?start=169#from=embediframe
Indeed, this is quite interesting !
On this one we hear Mr Hakim playing this organ:
http://www.youtube.com/watch?v=HDSfz5HG7AA
Best wishes,
Pierre