I recently came across the files that I merged for this video while strolling through the online archives. It's probably the first proper DSI demo still available on video.
The Evolver presentation is from 2003. It has been filmed by and at the Synthesiser Service Centre, London, UK, then UK distributor for Dave Smith's Evolver, Roger Linn's AdrenaLinn, and a wide range of digital audio products from Mutec GmbH.
The subpar quality results from the fact that the 10 parts this video consists of have originally been made available in the RealMedia format, the common streaming format in the olden days of the internet.
Dave Smith wrote a little note about this video on December 1, 2003:
"On a recent trip to London I was 'filmed' running through some Evolver basics. […] I was a bit haggard after finishing the Paris-Brest-Paris race a couple days prior, so pardon the monotone. Special thanks to David Croft at the Synthesizer Service Centre (our UK representative) for putting it all together!"
(From the ancient news section of the Dave Smith Instruments site.)
Sources:
https://web.archive.org/web/20041206091438/http://www.synthservice.com:80/downloads.htmlhttps://web.archive.org/web/20070817230359/http://www.davesmithinstruments.com:80/other/news.html