With World Cup fever building, French soccer star Zinedine Zidane appears on the big screen at the Cannes Film Festival this year in an offbeat documentary that took many viewers by surprise."Zidane: A 21st Century Portrait" is impressionistic and experimental, far removed from the standard documentary treatment of famous people. The midfielder is filmed in real time from 17 different cameras during a home game in April last year between his club Real Madrid and Villarreal, using closeups of his face, ankles, hands, legs and torso or panning out to show the whole stadium. Images move in and out of focus and the sound is at times a deafening roar and at others turned down to silence. Reuters reports.