TMZ has released footage of Joanie Laurer which was recorded prior to her death. From what I understand, this was meant to be seen in the documentary that Chyna was doing.
Filmmaker Rob Potylo said The 9th Wonder of the World told him the injuries were a result of a champagne bottle attack at a liquor store, however he believes she fell while intoxicated and was too embarrassed to admit it.
Rob said after seeing this video he was concerned for former Women’s Champion well being, and reached out to WWE about getting her help, but they were too late as Chyna passed away during the intervention process:
Source: TMZ.com