The video shows Tyler Clementi playing violin.
Clementi's violin teacher of five years spoke to "The Early Show" exclusively.
Khullip Jeung said of his pupil, "He was a quiet person, but when he picked up his violin, it was a different story."
CBS News National Correspondent Jeff Glor said authorities announced they had identified the body they found in the Hudson River as that of Clementi. Now, more details have emerged about the online events that led to the tragic end of his life.
In online postings believed to be from Clementi on September 22, he is thought to have written, "I texted roomie around 7 asking for the room later tonight and he said it was fine. When I got back to the room I instantly noticed he had turned the webcam toward my bed."
Police say it was the second time in three days that Dharun Ravi streamed, online, a sexual encounter between Clementi and another man.
Clementi said, "I haven't even seen my roommate since Sunday when I was asking for the room the first time ... and him doing it again just set me off. ... I turned off and unplugged his computer, went crazy looking for other hidden cams..."
Later that day, Clementi took his own life, police say.
On Thursday, talk show host Ellen DeGeneres spoke out, saying, "This needs to be a wake-up call to everyone that teenage bullying and teasing is an epidemic in this country -- and the death rate is climbing."
New Jersey governor Chris Christie was visibly upset as he addressed the tragedy.
Christie said, "As the father of a 17-year-old, I can't imagine what those parents are feeling today. I can't."
Christie says he won't tell prosecutors how to proceed with the case against Ravi and his friend Molly Wei, who so far are only charged with invasion of privacy. But, aluthorities say, that may change if they find evidence of a bias crime.
Whatever the charges, Clementi's family and friends are mourning the end of a promising young life.
Glor added Clementi was scheduled to perform with the Rutgers Symphony Orchestra on Saturday night. Officials say his name will remain on the program.
To see the video obtained by CBS News, click below: