Kernel, that was a very informative video, thank you. I'm not very informed about running, so Iam sure my form is not optimal and that video was easy to understand and try to adopt. If I do anymore running, that is. I don't enjoy it much. 
We walked and walked and walked... then walked some more, as we were in urban European cities, so I have a hard time determining if my running shoes or "town" shoes were making my heels sore. We easily walked 4 hours a day in addition to my workouts. If I continue to run as a cross training tool, I definitely need to evaluate my form and shoes. On the trip I discovered the running sub forum here, so if I have inquiries, I'll direct them there.
The bicycle has done more for the emancipation of women than anything else in the world. ~ Susan B. Anthony