We get asked a lot:
"Where do you guys find free and good music and sound tracks for your FPV videos?"

By using popular songs in your videos and upload to Youtube, would sometimes result in warning from Youtube complaining about copyright infringement, threaten to insert advertising in your videos or even have your video blocked in certain countries. 

To avoid this problem some people choose to upload their videos on other video streaming websites, like Vimeo or Airvuz. For copyright-free music, there are quite a few sources you can download them from, here is a incomplete list (please comment down below if we are missing any):

• Youtube Audio Library - https://www.youtube.com/audiolibrary/music
  
• https://m.soundcloud.com/royalty-free-audio-loops
  
• http://dig.ccmixter.org/free
  
• https://soundcloud.com/ (mostly royalty free, but make sure you check)
  

Alternatively, search for your favorite title and artist and add "Mash-up".. YouTube will usually allow them without any copyright infringement.

Feel free to suggest any ideas not mentioned.

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Update 05 April 2017

Some good, free songs:






Or simply search "fpv music" in youtube.
https://www.youtube.com/results?search_query=fpv+music

Free Music Archive (relatively user friendly): http://freemusicarchive.org/
The grand-daddy, the Internet Archive audio collection (more than just music): https://archive.org/details/audio

Yourube audio library is also a great place if you need to download sound samples like clapping hands, glass breaking etc.

If someone really wants to use a copyrighted track, check if it isnt blocked in https://www.youtube.com/music_policies . Even if you use a mashup or remix it's good to check if original isn't blocked in case youtube recognizes that one.