Youtube in HD modes often has AAC at 192 kbps. Bandcamp, which I'd guess is a music-oriented service, for non-bought tracks seems to give me mp3 at 128 kbps. So yeah, sounds like Youtube is quite alright for discovery until you're ready to part with the money (though Bandcamp is much lighter on the cpu overall).

However, this whole discussion falls firmly under ‘suum cuique’, and quite pointless in the light of `youtube-dl` being not just for Youtube, as already mentioned.