The GDC clip is basically him talking on others people work completely unrelated to what he's supposed to sell. High five!
Check out a nice work by Sephiroth Art called “Falling Star”.
Nice technique here, right? Actually, you can try creating your own art full of stars with the help of some free brushes from the artist.
The artist decided to release a new brush set on Gumroad to help young artists and to promote his work.