I was going to recommend the same video, def works. Also, and this is an easy one, but I've done it before, make sure the valve stem is actually between the tire beads, I've had it where I popped the tire off to one side of the valve without realizing it. But if that's not the case, then getting the bead started in opposite directions as shown in the video usually works. I've always been able to seat with a floor pump using that method.