I could list a bunch of general YTers that cover retro games among other gaming topics, but for those who mainly cover retro games I like Big Ole Words, Hungry Goriya, and Video Works.
I just started watching Now in the 90s. It has an episode every Friday and goes over the console releases of that week from 30 years ago. They pick a couple games to do more in-depth on reviews then shows the current value of the games with and without a box. They're 8-15 minutes.