YouTube is a great streaming platform, but it has a lot of issues. Most of all, I wouldn't say I like that there isn't an option to let it play the music after closing the app, not the mobile phone for answering a message or just reading. Also, if you fall asleep, it won't close after a few times, and it will play all the videos one after one until the battery dies. Luckily I solved all these issues by installing the APK file of the Premium YouTube app. They included all solutions in the premium app of YouTube. However, in my opinion, this is a scam, so I installed the APK for free.
I watch movies more often on my laptop, but I constantly listen to music on my phone on the way to work and during training. Here is the site https://softorino.com/convert-mp3-iphone-ringtone/ here you can learn more about how to download the app.