I have those videos and love them. Thank you. Have watched them several times and have learned a lot, though I would still like more in-depth info on some of the less common hammer points (cylinder, for instance).
I have taken a workshop with Albion Smith where he showed us how to use the hammer handpiece for background texturing. (Yes, ear protection is mandatory when doing that!)
There are also some Youtube videos showing the hammer handpiece in use, however they are not instructional videos, per se, just observational ones showing a jeweler at work. Some how-to info can be deduced so they can be useful.
More information is always welcome!