It's Datathief. Brian Flanagan commented in the YT video (https://www.youtube.com/watch?v=huslqo2x2qQ&t=38s) i'll transcribe it here:
'This is one of the 1st 2 demo tracks datathief put out, not autechre, but thanks for the complement. we recently reissued a ton of old stuff on bandcamp, https://datathief0000.bandcamp.com/album/recovered-data unfortunately this demo was passed up by skam, so its lost, apart from this recording - the other track on the demo was also played on disengage.'
we've got our answer, finally coz it was bugging me, such a great track
also such a p