So if we have a video with original speech, this is not going to work. Watch the video below how to add or edit background audio to your YouTube videos and upload to YouTube. The highlist of the videos is that since the original audio is not played after adding background music, you can download free audio tracks for your YouTube projects from YouTube audio library and edit it offline and upload to YouTube.
If you edited background audio on Youtube and lost the original audio. How to bring back the original audio?