If those are trees in the foreground on the right, that thing is pretty darn high, because, based on the fact that the tree hasn’t caught fire, the eruption must be some distance behind it.
It’s monstrous!
Yes, the lava fountain is a pretty good distance beyond the trees and is downhill from them. The house where they’re set up to get the live stream is about a half mile away and they’re zoomed in on it. It makes perspective a little difficult to grasp. It’s a little easier during the day time.