Tomas Slavik....the MT bike racer. Balls of steel.

The pilot was using a pusher quad with prop guards and Naked Gopro of some sort.

   

overall they risked the reputation of our hobby, pretty reckless way to dangerous to fly close to the peoples on a somehow "experimental video transmission system"... idiots on the sticks with public attention xD

i like to do an mtb footage, there will be a small part of a trail, but i will do a better focuses than rare following :-)
while its impressive to see the whole ride their video, the pilot level looks like a freestyler does race for the first time, its a shame to see a professional provide such a level of flight and ignore the needs of good reputation for community... if professional pilots have a need to progress in that direction, that will end bad overtime

Redbull event and they probably  have the South American city councils  approval for the stunt ( or may be not).  Redbull  always push the thrill envelop for publicity and their brand identity.
  There's risk for the spectators for sure at such event  and getting hit by a drone is probably not on their mind when they turned up.

Reminds me of some crazy days of Group  B.




You see more FPV footage by various media organisations/sanctioned sports event now, even big open prop cinelifter flying into indoor  sport stadium with people around at a live event .  Ummagawd posted  a YouTube of his flight  last week but he had removed it since.