What Is ADD-H, Is It The Same As ADHD?

Is add-h the same as ADHD or is add-h attention deficit disorder without hyperactivity?
I know what ADD is, I am asking if ADD-H is the same as ADHD.

I can’t figure out if ADD-H means attention deficit disorder without hyperactivity or if it is just the same thing as ADHD.

Here’s a Video 5 Things You Need to Know About A.D.D. and A.D.H.D