I managed to catch a rather brilliant documentary back in 2008, directed by Mika Taanila, at Sonic Acts festival in Amsterdam.
It’s called The Future is Not What It Used To Be, and centres on little known Finnish artist Erkki Kurenniemi (who unfortunately passed away a few years ago) and his early pioneering computer artworks and instruments.
At the time I think I found a copy online, and even appropriated it in a live set at one point, but as far as I know there is no official release and it seems to have vanished somewhat now. It just does the rounds at film festivals every now & then, or at least it did for a while.
It’d be nice to see it get loose on a streaming platform of some kind. I think I still have a copy lying around somewhere.