The first is 2 hours of just pure modeling goodness. Just ... WOW

Second is very short. Also, he has a BUNCH of great videos. New guys, he demonstrates a bunch of products; techniques and explains differences between the world of acrylics; enamels; oils; pigments; pastels and when to use what and how.

Just to note that pigments are easily turned into paints. If you aren't careful you can have a really nice dust turn to almost nothing. You can buy a fixative, but even then it takes practice and some care.

Mind you pin washes and many of the other techniques are a blast to learn.