About the youtube music playlist downloader
Music playlists have requirements that generic downloads ignore. Track order has to survive, titles have to be readable, and the audio settings that are fine for a podcast are audibly wrong for a mix. This page is the music-shaped version of the same loader.
Start from YouTube Music rather than plain YouTube whenever both exist. The Music catalogue carries structured artist, album and track metadata, while the same songs on regular YouTube arrive as 'Artist - Song (Official Video) [HD] [4K] Lyrics'. Cleaning a hundred of those by hand is an afternoon you do not need to spend.
For settings, use 256–320 kbps MP3 or M4A at a comparable size. Stereo, always — mono is a speech optimisation and it collapses the width that makes a mix sound like a record. If you DJ or mix, keep the highest available rate; time-stretching exposes compression artefacts that are inaudible during passive listening.
Organise as you go. One folder per playlist or album, a two-digit track index at the front of every filename, and a cover image saved as folder.jpg. Nearly every serious player — foobar2000, VLC, Plex, Apple Music, Android's stock player — picks that up automatically, which means your library looks right the first time.
Worth saying plainly: this is for personal listening. Artists earn from streams, and an offline copy of a set you already listen to is not the same as sharing it. Where an artist sells the release, buying it is the better long-term option — and the only one that gets you a genuinely lossless master.