The GDC clip is basically him talking on others people work completely unrelated to what he's supposed to sell. High five!
This is a trailer for Polybrush – a fast and simple 3D software that is used for modeling. It uses drawing as opposed to traditional methods of modeling. The brushes have different sets of parameters which can be selected which are selected by a modifier stack. Polybrush was originally conceived for a three-dimensional sketching.
© Polybrush, 2016 YouTube Link