It Gets Weirder ...
To this day, no one has any idea who these people are. Authorities have ruled out the possibility of the video being a hoax (or, like, viral marketing for a new found-footage movie), but no bodies have ever been found, and there's no official reports of an incident like this anywhere. They think the victims were pirates who tried to mess with the wrong fishing boats, but that's only a guess. The murderers haven't been identified either, because it's not like they turned the cameras on themselves and posed for selfies ... wait, no, that's exactly what they did. For several minutes.
The only major clues in the video are a banner with "Safety is No. 1" written in Mandarin (how do they write "irony"?), along with a registration number on the hull of a ship passing by in the background. That ship was eventually identified as a Taiwanese tuna vessel called Chun I 217. The owner of this boat was tracked down, but had little information to offer, since he owns over a dozen fishing vessels and claims it's super hard to keep track of who he lends them out to.
Meanwhile, Fijian authorities have pretty much taken a "not our problem" attitude, since they've had no reports of any missing mariners and believe the murders didn't occur on their turf. Oh well, at least they tried.