Cocina al natural.
Cocina al natural, with Sonia Ortiz, is in Spanish, though everything is done so clearly and logically it should be possible to follow even if you don't speak Spanish.
She is crazily prolific, with over 1200 videos uploaded. Not all of the videos are of strictly Mexican cusine, though over the course of the 1200 videos she has covered anything I have ever searched for.
The videos are concise, as are the recipes themselves. They are similar in some ways to Mark Bittman's Minimalist videos, with each recipe taken to it's essentials and no unnecessary frills or elaboration.
The channel has almost 22 million views so far - so she is clearly doing something right. I'd highly recommend it to anyone looking for guidance on any Mexican dish.