This video goes through the steps needed to sharpen a kitchen knife using a sharpening steel. The presenter goes through sharpening various knives, using two different sharpening steels. He shows the proper technique of how to use the steel, how to hold it and how to move the knife across the steel. He also shows how to check how sharp the knife is, by carefully moving your thumb down the blade, rather than across the knife, and also how to use a tomato to check for sharpness.
By following the steps in this video, you will have safely sharpened and tested your knife.