This is a serious indication, although the guy has removed the video now but it tells a lot. The problem is what can Pakistan do.
a) Military Strike- We can not launch a military strike inside Afghanistan while there is still US presence there.
b) Co-operation with Afghans- We have tried to co-operate with them but the establishment that Karzai created is still quite strong there so our efforts bore no fruit, but i think we are still following that policy.
c) Support Afghan Talibans- We can start supporting Afghan Talibans big time so that the hawks in Kabul can feel the heat, but that will actually be meaning again getting into good taliban bad taliban debate. And the regime will not fall any time soon and even if it falls what is the guarantee that these good talibans will not turn their guns on us and start helping their TTP compatriots.
d) Seal our border completely- This can be our only meaningful option but because of the huge size of the border and the mountainous terrain this will be one hell of a task. The border should be walled, mined and checkposts needs to be created and manned all across the border. Drones and other electronic measures should be used for surveillance. Certainly we will have to beef up our security forces for that and will most certainly will have huge monetary cost. But if we can wipe these bastards from our land and then can keep the same kind of presence on eastern border as we have say along the LOC, i think we can pretty much end this terrorism once and for all.