I found this amazing video of the Yamaha CS-80 a couple nights ago which showcases some awesome sounds and really shares the beauty of the instrument. This video comes from Logan Mannstrane, who has an awesome Vimeo account dedicated to ambient synth sounds here. I've also posted a couple of his other videos below, the Oberheim 4 Voice SEM and a custom SCI Pro-One. All of his are beautifully shot.