Cool Vid!! Thanks for posting! The only thing which i believe is 'wrong' is the face that one should have a 2 angles. It is not directly wrong to sharpen that way i don't see what the advantages of using an onglette is if you sharpen the onglette that way... If found this earlier thread where i explained how to sharpen the onglette.
http://www.engravingforum.com/showthread.php?t=8810