Here is a brief article with three of my favorite Zwift YouTubers. As a Zwift YouTuber myself, I often watch other videos to get inspiration for my videos.
Shane Miller | GPLama
Shane Miller covers lots of Cycling technology related things, including Zwift. https://www.youtube.com/c/ShaneMillerLama
Don’t Get Dropped Cycling
Watching this riders content is always entertaining and fun to watch. https://www.youtube.com/c/DontGetDroppedCycling
I discovered Zwiftaholics after the rider who owns the channel wrote an article for Zwift Insider. He is curently trying to take a win on every Zwift Classics course. https://www.youtube.com/c/Zwiftaholics