It would be nice to have in your initial post a static picture of the finished pen ... as motivation for watching the video and also as a point of reference to view before and after the video. . Is it possible for you to add such a picture now ?... not necessarily of the same pen (which may have been sold by now).
Also, what type of wood did you use for the pen ? . Also what type & brand of glue, and the brand of turquoise ... video is too fast to catch this info.