France, Aug. 21 -- French police are investigating the live-streamed death of a man who had regularly been shown enduring violence and humiliations, raising concerns about the practice of broadcasting such content online.

Prosecutors ordered an autopsy and opened an investigation into the death of Raphael Graven, 46, in the village of Contes, north of Nice in southern France, that was broadcast on Monday on the live streaming platform Kick.

Graven,known online as Jean Pormanove, or JP, had built a following of hundreds of thousands on the platform by participating in live "trash streaming", in which he wasphysically assaulted or humiliated as viewers watched live and sometimes donated money.

On Monday, on the 12th day of a live stream,...