Something my trainer said, was not to look at your dog, but to look at the object you want the dog to go to. And look at your dog from the corner of your eye.
That worked for me and my "not used to thinking himself" dog.
As you are looking at the box, your dog might start to wonder what is so interesting about it and might go and investigate.
I am a bit impatient, so I "helped" my dog, by having the box between him and me. So if he wanted to come to me, he would have to go past the box, so I was setting him up for a succes.
You could call it luring, but it isn't really. Just a little cheat.
Another thing I always do, with Cooper(the not thinking for himself one

) is, what Sara does in her vid. Not deliver the treat in the mouth, but toss it, so the dog has to get moving to get it. Less chance of a shut down, by just lying there.
BUT like I said, I am not a freeshaper. I do love to see it, but i'm just too impatient(although I have been training this

and I am improving

)