Firstly, you will need to download and install iMovie and the second app is WhatsApp which you might already have. But, there is a neat workaround with the help of 2 third-party apps. In iOS, uploading MP3 files to YouTube is tricky as iOS doesn’t allow you to download music on phone. In all, there are 4 ways to do this and let’s discuss them in details. The easiest way is to do it with the help of an “Audio to Video Converter” app. While you can go ahead and edit them in a video editing software like Premiere Pro, Final Cut Pro, etc, they often overkill for most users. But interestingly, the link Google shares in the error, tells you nothing about how to convert audio to video file. Apparently, YouTube doesn’t support MP3 files and you will have to convert it into a video file.