I think he'd gain some credibility - as would most reviewers - if he had a reference setup and just substituted the component he's reviewing into it. Most reviewers have so many variables floating around every time they listen, who knows what's causing the sound? But, he's an entertainer.
He does have some interesting playlists on Spotify. You might find some new audiophile tracks you like in there. I did. I copy them over to Qobuz.