I have been thinking about it and I think that since he was videoing the laptop, it stands to reason that someone did leave a cell phone behind which he was using to make his little videos, and someone left a laptop behind which he was using to access his own accounts. Just a guess.One of the videos last night from Fry was showing a laptop in the tent that was on. He can video and post to youtube with that as long as he has wifi or satellite. He can even skype if he wants to.
They also had to go through all the mess of stuff everyone left behind. There could have been cell phones left behind that are still active. I'm betting it's that laptop though.