Fix a youtube video that has been muted
Copyright claims have been put into effect to protect people's content from being stolen and used improperly. In some cases, you can remove the problematic song, and the restrictions that come with it. This can often be done without muting the entire video, so your original audio will remain.
In YouTube Manager you will be given the option to remove the offending audio or to overlay with new audio. It might take some time while the edit is progress before you find out if the video has passed the copyright restriction
After the video has been edited you will be taken back to the Video manager with a message saying that the song has been removed with a Save message. Click Save and then wait while it is being processed.