Retro Game Corps - A youtube channel dedicated to SBC Gaming
This channel has reviews for new hardware and costum firmware. His website is also full of written guides.
https://retrogamecorps.com/
I second this. Russ is awesome, his reviews are thorough and the videos are very cathartic. And the best thing - there are no dumb clickbait thumnails, no cliche "like and subscribe", no sponsor segments.