If you want to use or post recorded music on the web (for example on Facebook, YouTube, etc.) or make recorded music available online, you will most likely need to obtain and pay for special licensing from the owner(s) of the music or recordings in question. While principles of fair use protect reasonable uses of sound recordings in the context of teaching, scholarship, and research, fair use principles have limited application outside of those contexts (for example in videos created by colleges or departments for informational or promotional purposes). Such uses usually require permission and often the payment of fees for at least one, and typically two, separate licenses.