A very early screen recording of the Guardian's 'SecondFest' festival held within SecondLife (2007). For more information please see https://en.wikipedia.org/wiki/Secondfest
Alongside music there was also film showings and my girlfriend at the time Mary Webster had submitted one of her stop-frame handdrawn animations which had been selected. So we got to watch her work on the big virtual screen. The music featured in her film was 'Neon' by Mr Beasley (https://soundcloud.com/mrbeasley)
The recording above was taken on a Pentium laptop, from a pub beer garden over their wifi - I have no idea how this worked!