Good idea. There a few things that I want to add:

- video volume could be a bit louder
- I personally think it is a bad idea to use WED to promote GS3d. WED is outdated & clumsy, and while some diehards here may still use it, I doubt new users will like WED. Better is to either skip map editors as a whole (place ents through script) for now or use e.g. Sivan's editor. Though on the hand I understand its easy to create good looking lightning with blocks and blocks allow bsp building.
- I am not entirely sure about this one, but it looks like the way you create actions results in an alot of duplicated code when different more types of entities (more enemies etc.). Its fine for now, I would suggest to eventually add a tutorial where you make functions that can be used by different types of entities (gravity(), movement(), jump(), scan_for_enemy(), etc.).

keep it up