I added new four video tutorials

I added links to new four video tutorials to xoopscube.org Wiki. All of these video tutorials have been generated using Wink. And, in some tutorials, I tried to reduce file size editing frames. By that, "Control Panal UI Concept" movie became 4.8MB -> 1.8MB.

P.S.
You can get wnk files I made, accessing {file body name} + .wnk. These files are free BSD licences for modifying, translation and etc. Example.