Sunil Tripathi, 22, went missing March 16. The video shows a man walking south on Brook Street near Sunil's apartment on March 16 at about 1:30 a.m., about 20 minutes after his last-recorded computer activity.
The man on the video is tall and skinny and is wearing a black cap, dark jacket and jeans, matching Sunil's description.
Sunil's family has asked area businesses to turn over their surveillance footage in their efforts to find him.
"It's nothing definitive, unfortunately, but it does provide us a better timeline and direction that he possibly could have gone," said Sunil's brother, Ravi.
Sunil graduated from Radnor High School. A philosophy major, he had taken a year off to figure out his future. His family says he suffered from depression but seemed fine. A short, cryptic note left in his room didn't provide investigators with any direction.
"He's in contact with multiple family members probably every day so this is incredibly unusual and out of the ordinary. It's not something that we even would have expected. It has taken us all by surprise," said Ravi.
Sunil's family has traveled to Providence to help police and the FBI with the expanding investigation. Social media is generating widespread attention to the case. Reports are coming in from up and down the east coast from people claiming they've seen Sunil but, so far, his disappearance remains a mystery.
Ravi said the family is keeping up hope that Sunil will be found safe and sound.
"It feels like a little bit of progress and a little bit of hope for us," Ravi said.
The Bryn Mawr, Pa., native was on leave from the Ivy League school but living in an apartment near campus with several other Brown students.
Anyone with information on Sunil Tripathi's whereabouts is asked to call Providence Police at (401) 243-6191.