all of this is nonsense. there is a system of Torah and Halacha, and what you are describing is not it. A Rav, any Rav, has to understand the sugya he is paskining and be able to explain himself in the Gemara (or at least in established foundational poskim). You can’t paskin off a video nor can your rav.
I don’t mean to imply anything about Rav Chaim ztz”l. But, if the video is not a fake (did it only get released this past year? long after his death?) and he did indeed understand the question and gave an answer like the Eretz Hakodesh group is claiming, that would simply place Reb Chaim deep in the middle of the sugya of Zuken Mamre (or Nuvi Sheker for those who like to go that route).
We Jews are obligated to keep to Torah not rebel against it like the zionists.