Looks like the 59 had a lot of rust issues so not fair. 
I see no evidence of any rust issues. I see a copper brown car that looks to be in great shape.
O K take a look @ top veiw frame 1:24...RH fender separates from body without the slightest bend/deflection in the fender. Wonder what other bolts were left out or missing frame sections....you decide.
I looked at it in HD and stopped the video at 0:36 - notice the fender deformation on the Bel Air as it's still attached at the top. The bolts aren't left off, they shear off.
Three major differences that drastically improve survivability in 2009:
1.) Crush zones - the Malibu is designed to give up it's forward structure to absorb energy and protect the passenger compartment.
2.) Better passenger compartment structural integrity - notice how the windshield stays in the Malibu and how the A-pillar doesn't deform. The Bel Air windshield goes flying as much of the impact energy is transmitted into the A-pillar and door - the roof even deforms. That energy also gets transmitted to the passenger compartment and to the passengers.
3.) Most important, passenger restraint systems. The Bel Air would have, at best, lap belts, which are great for holding you in place around a curve, but do almost nothing to increase survivability in a head-on impact and, in fact, increase head/neck/spinal injuries when the occupant pivots at the waist and strikes his head against the dash or seat back of the front seat (for rear seat passengers.) The Malibu has three-point belts, you can see the air bags go off and the Malibu has a cabin designed to minimize injuries with bodies striking objects inside.
