The 아/어 하다 form has more than one use. One of the most common places you'll see it is in the form ~고 싶어 하다, but it can also be used with descriptive verbs to turn them into action verbs.
This form is especially useful when speaking about someone in the 3rd person, which we'll cover how to do in this lesson.
In other news, I think I might need to get a new back scratcher....
Also make sure to get your free PDF version of this lesson (and every lesson in the "Learn Korean" series) by clicking the download link right below this video~!