Katsunori UJIIE demos all sorts of synths and associated kit, new and old, digital, anaologue and software. He's a great player and an enthusiastic presenter. Many videos have captions if you happen not to speak Japanese, though they are also enjoyable if these are missing.
Here's a video of him rocking hell out of an old Minimoog in need of a little work:
Part II:
Text only, no HTML, * denotes a required field.