He's got a master's in comp sci I thought. An automatic upload is easy to rig up. Easier than trusting anyone else with a high profile murder.

I'm a little surprised that if it was as well planned as it SEEMS to be, that he doesn't have some kind of backup besides yt. If it were me, I'd set up contingencies so whatever I wanted to get out would get distributed even if all known accounts had been shut down.