Droners.io - Get anything filmed by a drone (Airbnb for drone pilots)
Coverr - Beautiful free stock videos for any use
AirMap - Can I fly here?
Pexels - Find the best free stock images about Browser Home Page. Download all photos and use them even for commercial projects.
DroneBase - Imagery & video flyovers via drone
Videoblocks by Storyblocks - Be brilliant on a budget with quality stock video clips