I'm a Spanish person, living abroad and with a penchant for cooking, and I was too very gratefully surprised by Kenji's Spanish tortilla video. Also by his other Spanish recipes such as Gazpacho[1] or Paella[2].
It's not that they are very orthodox recipes, cut and paste from a traditional recipe cookbook, but instead very good adaptations of them, taking into account ingredients availability and different contexts.
I can't really tell about other cousines, but judging how he cooks Spanish food I'd say he knows what he's talking about.
Add to that that he seems like a very decent and empathetic person and I'd say he's someone you want to listen to if you are looking for cooking advice.
It's not that they are very orthodox recipes, cut and paste from a traditional recipe cookbook, but instead very good adaptations of them, taking into account ingredients availability and different contexts.
I can't really tell about other cousines, but judging how he cooks Spanish food I'd say he knows what he's talking about.
Add to that that he seems like a very decent and empathetic person and I'd say he's someone you want to listen to if you are looking for cooking advice.
[1] https://www.youtube.com/watch?v=lD3WyeqCDHw
[2] https://www.youtube.com/watch?v=ASP74I0B7zo