"Investigators believe Graham and Matthew left the restaurant Tempo together between 1:20 a.m. and 1:40 a.m. Saturday morning in Charlottesville."
http://foxnewsinsider.com/2014/09/2...ham-disappearance-‘we-want-talk-jesse-matthew
A rather large twenty minute spread for the time they left Tempo, allegedly together. AFAIK No further video captures them together.
In the press conference, they said that they know for a fact that they left together, so it's possible that there is video surveillance video from after they were at Tempo, but that it hasn't been released. What they seem to desperately want is someone that saw Hannah get into his car.