for gear review, i would say TheCameraStore is really good. offer tons of useful info in a professional way yet doesn't make the audience feel bored.

for tutorial, there are some channels that offer different kind of tutorial. most of the just cater beginners though, i watch JaredPolin and TonyNorthup most when I just started photography.

TheVonWong, KarlTaylor and Chase Jarvis produce videos that are more "professional" and in depth if you wanted to learn deeper and harder skills.