I looked for audio too, before I posted - I should have mentioned that, sorry!
Yes, there is checking the tanks during preflight - although I realize it is difficult to actually see into the tanks of a 172 - but still... And then there is looking at the fuel gauges after you start the engine - also typically a good idea! And maybe once or twice on the ground BEFORE you take off, just to be sure. It is an older C172 (1963 vintage), so probably no fancy fuel totalizer, but a working fuel gauge is an FAA airworthiness requirement. Maybe I'm just overly paranoid about running out of fuel, but my personal minimum is to never land with less than an hour of fuel remaining. This guy took off with only 20 minutes of fuel in the tanks - not even legal.
I am assuming there were no extenuating circumstances like a fuel leak or mechanical problem or something because he took back off from the highway. If there had been a problem, the plane should have been grounded, or at least repaired first, but it doesn't sound like that happened.