I have seen the video, but I am not qualified to evaluate it. I have not seen comments on the situation from the Israel Antiquties Authority. The area is not under their jurisdiction, but I image they would be interested.
PaleoJudaica posts involving the Iron Age I altar on Mount Ebal (which may or may not have anything to do with Joshua) are here, here, and here.
Visit PaleoJudaica daily for the latest news on ancient Judaism and the biblical world.