The last embedded video seemed to work. It did list all the related videos (when I try to omit that things don't work, sigh). But before I leave these amazing videos by Pierre Tardif you need to look at this one: Hand Lettering is Fun! (link provided in case the video doesn't get embedded).
In this video it looks like a Pentel Pocket Brush Pen in Mr. Tardif's hand. I'd swear it is. Look at the line quality he gets. Look at the spacing and form. After you watch this go practice with your Pentel Pocket Brush Pen, you've got something to aim for. I'll leave you to explore other calligraphy videos posted by Mr. Tardif and others.