When you upload a video to YouTube, the Content ID system will automatically figure out if you’re using any copyrighted music in it. Videos uploaded to YouTube are scanned against a database of files that have been submitted by artists and labels. The copyright owners can choose to then either mute that audio, block the video from being seen, or monetize the video by running ads against it.
Let’s say you made a video with the new and famous hit. After you search this new hit in the Audio Library and you’ll see the screen below, telling you what will happen if you upload a video with this song.
If you plan to monetize your video, you can download thousands of songs and sound effects from the YouTube Audio Library to use in your videos without restrictions, for free, forever.