It's the video on the the Mae hong son loop road in Thailand...
A road that is known to be a biker's paradise, I call it the Dragons Tail – 600kms and 3100 bends along with hairpins which wind their way through steep mountain trails, mist covered passes and steamy jungles, over hills and through river valleys. The curves are tight and often slippery when it rains or gravel-strewn. The descent at my first stop which was Pai was through paddy fields so green with the white beaming Buddha Statue that overlooks the town. The stretch between Chiang Mai and Pai alone boasts of 762 hilly curves.