I didn't find any videos and was sort of disappointed that she had that grand site and no demos or anything. This may be one of those tools I bought and will never use! Although, I did pick up a new magazine that displayed a quilt much like you find on this gal's site ... but, the instructions!
Compared to this block, the magazine quilt has way too much bias edges for my taste <g>.
The instructions with the ruler don't seem to be much help either, but I am thinking - - basically, you make a nine patch, then, using the lines on the x-block, you get your angles.
She did include one tip that told you what happens to each of the little squares when you place the ruler down, much like the tip concerning the disappearing nine patch ...
with that block, you are creating cornerstone and frame when you cut through the center of the nine patch in both directions ...
If I ever use this ruler, I will come back and share <g>