On the basis of that video I did a series of studies on a rough watercolour paper in June 2016:
From top left to right bottom - my own character design (it's painstaking to paint from memory - I don't like it too much), Frank Frazetta's destroyer, Barbarian from Deviant art and some old warrior again based on some reference from deviant art.
After one year I decided to revisit this idea in more depth. I think I will continue to do these master studies in the future because it is so helpful in developing the sense of design, brushmanship and so on. I did all tree master studies based on the video. The hardest part I have to admit was to draw the pencil underdrawings. To see all the shapes properly in space and put them right. Skill of drawing is essential really - so If you can, don't trace your subject and draw it free hand like I did. Here's my final takes on those master studies.
Stranik after Watts after Cornwell
Stranik after Watts after Leyendecker
Stranik after Watts after Frazetta
I approached all the laying of the paint in style of tiling as Jeff Watts describes. I watched a chunk of the video for a few minutes, paused and tried to emulate the Jeff's handling of a brush. All of this took me three times more that on the video.
Keep learning whatever it is guys, Pete