Here are four resources you can use if you need to find royalty free music for your YouTube videos:
YouTube’s Music and Sound Effect Library
YouTube has their own resource filled with tonnes of free music, sound effects and music supported by ads. This can be a great resource if you want simplicity whenever you are adding music to your videos. The downside is that they’re pretty limited in variety and if you use the ad-supported content, you’re going to have to deal with advertising playing in the background of your video.
This works on a subscription model and it has tons of tracks, loops and sound effects that you can use. There are a lot of great sounds on this site, but it also has its fair share of not-so-great beats.
The licensing of Premiumbeat.com allows you to use these tracks in multiple videos. If you purchase the rights to use one of their songs for a single video, then you’re not limited to that single piece of content.
This website is vast in both the quality and quantity that they provide. You can find anything from classical vibes to dubstep smash hits for your YouTube videos.