If you go to Audiophile NBR Music channel he lists some contact info if any questions or requests. I think he has like 3 different music playing channels. Then there are channels like Best Acoustic Voices, SOUND HD, Lossless Quality Audio, & more I can't think of. There are a few Jazz only channels like Don's Audio as well as some Asian channels with good quality. They will start popping up in your feed the more you start listening to them.
@dtximages this is what I use as well when listing equipment with videos or when people come by to demo to make sure something works. Hi res music can show weaknesses or be too transparent. I find that those YouTube videos sound good on everything. Maybe they have been remixed before posted..I dk.