Do you ever wish you could sit down with an expert and find out everything you need to know about ADHD? You're in luck. In this 28-minute video, ADHD expert Tom Brown explains ADHD as if you were sitting in his office. Find out why this is one of Understood's most popular videos, with more than 9 million views on YouTube. One of the most-liked comments is from someone who said the video is like "listening to a person you've never met describe you in nearly perfect essence and detail for 28 minutes."