I once did a blind test on myself. A FLAC audio file and a 128Kbit Ogg vorbis file of the same track that I could switch between as I pleased but without knowing which was playing. Yeah, I cannot tell the difference.

I am absolutely sure others can, but not me. I also think credit goes to far better encoders today than what we had 25 years ago.

But bandcamp is only 128 kbit MP3 for free streaming, now that’s not a mystery, but probably also not worse than whatever YT offers.