* Creative Commons: Creative Commons licenses allow creators to retain some rights to their work while still allowing others to use it for certain purposes. There are several Creative Commons licenses, each with different terms and conditions.
* Stock music websites: Some websites offer royalty-free or public domain music that you can use for free or for a small fee.
* Musician websites: Some musicians allow their music to be used for free or under certain conditions. You can often find this information on their websites or social media pages.
* Freesound: Freesound is a collaborative database of Creative Commons-licensed sounds that you can use for free.
* Musopen: Musopen is a non-profit organization that provides free access to high-quality classical music recordings and sheet music.
* YouTube Audio Library: YouTube's Audio Library provides a collection of royalty-free music and sound effects that you can use in your videos.
When using uncopyrighted music, be sure to follow any licensing requirements or restrictions that apply.