Proper use of a honing steel
As a quick clarification, honing is going edge first, stropping is going heel first. 

Honing will help to straighten the edge. Stropping will help to polish the edge (after honing).

In every other video I've seen (and on the Wüsthof website) they say to hone the blade. Stropping is more of a finishing method, so I would say to hone the blade first, and, if desired, strop the blade after.