High conversion efficiency and downloading speed, runs perfectly without any bugs. VideoSolo Video Converter Ultimate, which is a full-featured and all-in-one application for users to convert YouTube video to M4A. If you need convert your downloaded YouTube to M4A on Windows/Mac, personally, I will show you a surefire converter. How to Convert YouTube Video to M4A on Windows/Mac You can enjoy it with more freedom or play it at any iOS device that you want to play. Just sit and wait, you will get M4A audio file from YouTube video. Just select the M4A and click 'Download' again. After it analyzed this video, it will scroll down to the page where shows different output quality and format. Go to the website of VideoSolo Online Downloader. Open the video that you want to download on YouTube. Now, following the next steps, you will find that it is easy to complete the YouTube to M4A conversion.
Read it from: A Free Way to Download YouTube Video to iPhone/iPad. The steps for using VideoSolo on iPhone is a little different.