Dave Grohl (from Foo Fighters) has a documentary movie out called "Sound City". It's nominally about the SoCal studio of the same name which had a custom Neve console installed just in time to make a crazy amount of hit records between 1973 and 2011, but there is a very brief interview with Rupert Neve himself talking primarily about how he designed the transformers. I don't think you'll get anything out of the footage in terms of reverse-engineering the sound though
