How do you add itune song on a YouTube video?

You first need to convert the music from YouTube into an .mp3 file. You can do this by downloading a YouTube to mp3 converter from the internet. There are several different ones available for free on the Web.

Once you download the converter, you can usually just copy and paste the YouTube link into the converter, and it will convert your YouTube file into an mp3. Once this is done, the file is saved to your computer, and then you are able to upload it to iTunes.