Imogen Heap - Headlock (U-MYX Mix ver.) (a partially lost U-MYX Video Demo, 2006)
From The Lost Media Wiki
Screenshot of a video of the lost Demo
Status: Partially lost
U-MYX, was introduced in 2004, It became a unique music format that allowed users to remix and arrange their own versions of songs by popular artists. The U-MYX software was available on CDs and could also be downloaded digitally after purchase. However, after the company rebranded as GoMix in 2009, some tracks were lost to time, including "Headlock" by Imogen Heap.