The singer is seen crying in the 12-minute video, which she said she was uploading in an effort to help people understand mental illness.
"I am now living in a motel in New Jersey. I'm all by myself," she said.
"Mental illness, it's like drugs, it doesn't [care] who you are, and equally what's worse, the stigma doesn't care who you are."
"There's absolutely nobody in my life except my doctor, my psychiatrist - the sweetest man on earth, who says I'm his hero - and that's about the only thing keeping me alive at the moment... and that's kind of pathetic.