The video, which includes graphics and soft music, features the mayor-elect's daughter, in her signature headwear, speaking to someone slightly off camera.
Chiara explains that she suffered from clinical depression and after going to college, struggled with not having the tools she needed to cope emotionally.
Shortly after the video was released, the entire de Blasio family held an impromptu news conference outside their Park Slope home.
"We are incredibly proud of Chiara. I think, you look at this video, it speaks to a whole set of challenges that we face in our society, that families face all the time,” the mayor-elect said.
There were rumors about Chiara's drug use during the campaign, but de Blasio's camp refused to discuss them. They even warned against reporting something about such a sensitive topic.
Some questioned the timing of this video.
"This is a time of year, we all know it, when we have to be honest about it. Families are grappling with these issues. Families are getting together and the issues are evident. People are trying to figure out what to do to help each other,” de Blasio said.
"The timing can be argued back and forth in a political standpoint, but really it's to their first job which is to be parents and protect their daughter and their son,” said political consultant L. Joy Williams.
During the campaign it was revealed that de Blasio's father also suffered from addiction, and eventually took his own life.
The Obama Administration’s drug policy director issued a statement in response to the video which said in part, "Chiara demonstrated tremendous bravery in speaking out about her recovery, and I applaud her and the entire de Blasio family for addressing this important public health issue."