Foodwishes is the OG YouTube cooking show: foodwishes.blogspot.com has over a decade of content. Recipes vary in complexity but always does a good job of breaking down the steps & explaining the what and why.
America’s Test Kitchen and Bon Appetit both have channels with a lot of content, but are geared towards getting you to subscribe to their paid content.
There’s also a ton of old TV content available. E.g. Good Eats has a number of episodes posted (or maybe just parts of episodes, but enough to learn).
Kenji Lopez Alt is also a major content creator. He has several first person view videos with commentary while he cooks. This is a good format to see the cooking skills in action and help learn / improve techniques.
Beyond these big ones, there are many good channels with focus on specific culinary styles.