An edited fake.
....a complete fake. I was one of the first people to fly the Giles 200 aerobatic aircraft (the same model shown in the video). It's a Lycoming AEI0-360 powered single seat all composite monoplane and the wing spar runs from wing tip to wing tip. The video was an edited compilation of footage from a remote control RC model airplane painted to resemble the full-size aircraft shown at the end of the video that was turned so that the missing wing (that wasn't missing from the full-size aircraft) wouldn't give it away. The composite wing spar of the Giles 200 has never had an in-flight failure and the little airplane is capable of pulling 11 G's in cold dense sea level air at 230 mph. The wing itself wouldn't break at 18+ G's during static testing. In-flight at the maximum speeds that plane is capable of flying the wing will high-speed stall long before it breaks. If it did break the full span spar would not break cleanly at the fuselage wing root and you would see a trail of push pull tubes, fuel lines, and electrical lines trailing from both the fuselage and wing itself. The most notable thing about the Giles 200 is its spectacular roll rate of 720° per second. It rolls so quickly and the aircraft is so unstable that it never achieved success as a competition aerobatic aircraft.
An RC model aircraft has 10 times the power to weight ratio of an actual full-size airplane and they can be flown with just one wing. I have seen the video of the RC pilot successfully landing this remote-control plane and he was justifiably proud of the accomplishment. Having personally wrung the wiz out of the real thing I can definitively state that while the G200 will sustain knife edge flight (barely) it would not be able to climb, pull out of the dive, or flair to land with only one wing. Cheers.
Chip