I keep seeing comments like “This should be on spotify” under youtube videos. Guess what — I download them with youtube to mp3 converter, drag n drop them into apple music, and boom, it syncs to my phone. They live among apple music-native tracks. They don’t eat up icloud space (I don’t use icloud), and they don’t disappear when apple music subscription expires. I don’t know any music streaming service that has everything in hi-res or lossless and allows that.