He was best known for his reaction videos, where he responded to new releases and products, mainly from games giant Nintendo.
The 29-year-old had worried his followers with his behaviour on social media in the past, with the police called to his home following a suicide threat.
Uploaded at midnight on the evening of the 19 June (19:00 BST), his latest YouTube video, titled I'm sorry, featured Etika walking the streets of New York.
In the film, he apologised for pushing people away and confirmed he suffered from mental illness.
He also talked about social media, advising "caution" around using it too much.
"It can give you an image of what you want your life to be and get blown completely out of proportion," he says.
"It consumed me."
The original video was removed but copies have been uploaded by other YouTube users.