One of the best voice over YouTube channels, is the one of Mike DelGaudio - Booth Junkie. Mike is a voice actor, narrator for The NY Times, Atlas Obscura and Audible.
You can tell that he genuinely wants to help and his insights are backed by experience. His microphone comparisons are especially helpful and he doesn’t get caught up in technical terminology. Mike is sporting a hefty 19K subscribers and is definitely worth paying attention to.