It is called Traces of Death. Here is the BBFC explanation (its a bit long)
Multi-Aspect, Open Captioned, Traces of Death comprises a compilation of uncontextualised clips showing real killings, suicides, medical operations, fatal accidents, autopsies and other distressing images . The work presents no journalistic, educational or other justifying context for the images shown. Rather, the work presents a barrage of sensationalist clips, for what appears to be the underlying purpose of providing prurient entertainment. That this is the essential purpose of the work is reinforced by the addition of a sparse but sensationalist voice-over, which deliberately makes light of human death, pain and suffering. Some of the most graphic clips are needlessly repeated in slow motion, further underlining the prurient and exploitative nature of the work.
The Board carefully considered the work in the light of our Guidelines and the tests set down by the Video Recordings Act. A key consideration is the question of any harm that might be caused to potential viewers or, through their behaviour, to society because of the manner in which the work deals with violence and