I am a camera operator and air operator recognized by AESA (State Aviation Safety Agency) and I count all necessary documentation to operate a drone.
I have a four-engine drone to photograph or record stabilized images, riding a 4 Black Edition GoPro capable of recording in 4K format at 25 fps, 2.7K or 50 fps Full HD 1080 format.
I included some links to some of my work:

https://www.youtube.com/watch?v=r-lmwoyppTE
Global solutions for e-Commerce- Mecalux - Tradeinn

https://www.youtube.com/watch?v=eMgVWUeg2XA
Drone reel Ricardo Armengol 2016

https://www.youtube.com/watch?v=-ZRoYJKVb9w
Drone Marineland-Nice 2015

Recording with full frame cameras I can have a octocopter (drone of eight engines) capable of lifting up to 4 kg stabilized cameras. weight, Canon 5D Mark III, Black Magic, etc...

Thank you very much.
Ricardo Armengol.