There are many sites that allow you to download the audio files from YouTube videos. You can do a quick Google search and choose any site that works for you. We tried YTMP3.cc, and it worked really well for us.
To download audio files from online YouTube videos, open YTMP3.cc and paste the YouTube link into the text box. Make sure you have selected mp3 below the text box, then click Convert. A few seconds later you will see a blue Download button on the site. Click on it and save the file to your computer.
If you are looking for Android apps that download YouTube songs, you will be hard pressed to get a reliable option on the Play Store. Yes, you can try loading apps, such as New Pipe, to download songs from YouTube for free, but that’s not something we recommend. Side loading compromises the security of your Android phone, so you should avoid this method unless you know what you are getting into.