A few days passed and I have some news for you. I have tried the MP3FY for the first time. And I need to tell you that it has exceeded my bravest expectations. It has a built-in video search functionality that will let you search the video by the video title, would you believe it? It's extremely helpful to use on mobile devices. And mostly, it converts the video to the highest quality. But now I am going to test another interesting https://youtube-mp3.me/fr/fr-2/ resource. It seems to be a very simple to use at the first sight. Have you seen it before?
I myself prefer to use a screen recorder called Joyoshare VidiKit as a YouTube to MP3 converter as I think it would be much more convenient if I can choose which part of a video or audio to save instead of the whole one. I like to use it to save my favorite band's live shows in the format I need.