Before you jump into demonstrating cooking methods, you will need to do a little more online research to see these cooking methods in action. Look for videos of chefs or other cooks demonstrating the following:

At least two basic dry heat cooking methods such as sauté, griddle, pan-fry, deep fry, baking, roasting, and grilling
At least two basic moist heat cooking methods such as poaching, simmering, boiling, and steaming
Demonstrate both basic combination cooking methods, stewing and braising
Make a list of the links for the best demonstration videos for each of your required examples