Basically, if you know the story of Elsa Lam, you know what is going on with the videos. You don't even have to watch the first one. The last one is the one you should watch. It concludes everything.
The ultimate report came out and point to the fact that the bizarre behavior of Elsa Lam and her death are basically coming from mental illness.
Well, if that is the case, then it can explain everything, A mental illness person can hurt or kill him or herself without knowing it. Then the moving hands, touching all the elevator keys and all those things were once considered spiritual or evil related things. However, if it is bipolar, then there is no ghost or evil spirits needed to be involved.
As far going into the tank, well it was opened and it was closed and opened and naked body. All don't matter because she has bipolar, she may hear some voice asking her to strip before going to the tank. As far as the lid is opened, that does not matter either because at the end the employee said it was opened.
But 3 things you must wonder if it is really coincidental and that I found out from this show.
1. Morbid's lyrics were about China girl, drained in water.
2. 10 years ago Dark water with a little girl who wore red and died in the movie
3. Lam-Elisa about TB outbreak in the area.
Other than that, yes, blame it on bipolar, not evil, not homicide ...