A new feature in YouTube allows users to edit the uploaded videos for free in YouTube. Let us see this with an example by changing the audio for Auto startup Outlook 2010 using the Video editing feature.
Login in to your YouTube account and select the video that needs to be modified. Click the Edit Video link available at the top of the Video.
In the Video editing page, click the Audio tab then the Get recommended tracks.
Then select your preferred track from the Recommended list.
Now to apply the changes, click the save link available at the top of Video editing page. You can also save the changes as a new video by selecting the Save As option.
You might see the following prompt, click Ok to continue processing the changes.