Download link: https://www.youtube.com/audiolibrary_download?vid=e6ccf9b002d1951f
All Music: https://www.youtube.com/channel/UCEZczasge6oHujNFJLYm72w/playlists
The YouTube Audio Library consists high-quality 320kbps royalty-free music and sound effects free for the download and use of YouTube video creators. These tracks are available to be monetized and won't be claimed through Content ID.
When you monetize a video with a track from the YouTube Audio Library, you may be asked to provide additional documentation to show commercial rights to the music. Please include the music's exact title and a brief statement that you downloaded it from the YouTube Audio Library.