How do these members do the whiteboard videos ?

How do these members do the whiteboard videos ?

I seen few sellers offering whiteboard services which I am keen on learning how they do this as would like to try it my self. Is there a special software they use to make these videos for members. Also as any of you ordered any of these I just ordered one a moment ago so I can have it on youtube for one of my business sites. I hope its good anyway I would like to learn how this is done and how I could do it as I am very keen to learn new things and may want to also have this as one of my services.