Yes if the unit comes back made exactly to the template size you should be able to attach it and have the edges line up perfectly with you natural hair. This makes for the best attachment, regardles of if it's skin or lace. If you get it right with skin though, you will have the best feeling bond and it will be undetectable to the touch. I am wearing a thin skin now and mine lines up perfectly. If it is slightly too small you can stretch it to fit too.

In the video you posted the stylist has done what most stylists do in this case: just slap it on his head any old way, nevermind if it lines up or not. You will see this alot on youtube. I have seen some guys overlap it more than an inch and in one case more than 3 inches!

Try to make sure it is a good fit and you can line it up and you will love how it looks and feels around the back an sides.