Need Help To Save YouTube Music

Hello everyone. I want some help from all of you. Actually, I want to share music from my YouTube playlist with my niece. I searched the web and found this https://silicophilic.com/how-to-download-music-from-youtube/ article about downloading music from YouTube. There are some suggestions, can anyone tell me which is the most reliable? Any feedback would be greatly appreciated.

I use one called 4K Downloader. https://www.4kdownload.com/products/youtubetomp3 There's a video version and an audio version, although I think you can adjust the video version to also just get the audio. It'll take the YouTube audio track and convert it to an MP3, and then you can load that into ITunes, or put it on a USB drive, or... probably a whole lot of other things I'm not tech-savvy enough to know how to do.

In any case, I've had some good luck with that one. Hope it'll work for you!