How to paint like Titian, first glaze over grisaille

1st of 3 videos showing how I glazed this portrait in the manner of Titian.
I used a palette of
Titanium White
Cadmium Yellow
Yellow Ochre
Vermillion
Alizarin Crimson
Ultramarine Blue
Sap Green
Burnt Umber
Raw Umber
Ivory Black

source