Wow, that was easily the best explanation I've heard of this. Never seen this channel before somehow. Thanks! (Now I need to see if he has videos on the "Observer effect.")
I don't think we can say that spirits are not bound by time. If that were true then the future would be predetermined, thus we would not have free will. If they were not bound by time, Satan would have been an evil rebel from all eternity to all eternity. They may not be bound by the three physical dimensions that we are, but time is a different story. Jehovah can foretell the future, not by traveling through the time dimension, taking notes, and coming back to us to tell us what will happen, he purposes the future to happen in the way he tells it.
As far as how they saw Job, they could have been close by. We know the angels fly in midheaven. And of course, an aspect of the angelic realm could be that it is a higher spacial dimension, allowing them to bypass much of 3d space.
As an aside, it would seem to me that as soon as Jehovah created the Logos, some form of time must have been in existence, because at that point you have two things interacting. For interaction and change to occur you must have time. Ergo, we can't say that Jehovah is not subject to time. If we say "But he can do anything, so of course he could time travel if he wanted to" is just not really a fair question. It's really us superimposing our idea of "omnipotence" onto God, rather than just letting God be who he tells us he is. We have to avoid Hellenizing Jehovah like the Greeks did during the Great Apostasy.