The official way to use copyrighted music on YouTube is through YouTube Studio > Audio library. The audio library includes free music and sound effects, some of which don't even require attribution.

Over 16,000 sound effects have been made available for free from the BBC library. The archive includes effects that have been used on the corporation’s radio output since the 1920s. Now, the general ...

The Pokémon Company has released an online sound library allowing users to listen to music tracks and sound effects from the original Pokémon Diamond and Pearl games. The sound library has 149 ...