The top one features Candide Thovex.
Candide Thovex (born 22 May 1982) is a French professional skier, filmmaker and entrepreneur. He is notable for his creative movies to the sport of freestyle skiing, and professionally has won numerous contests and accolades... He is widely considered to be one of the best freeskiers in the history of the sport.It's artificial in the sense that several downhill runs have been stitched into one sequence, but my understanding is that all of the tricks are real, not CGI.
The second is more conventional and arguably more enticing. Kudos re the choice of Claire de Lune for the musical background.
via Boing Boing.
I recommend clicking the fullscreen icon to view both videos.