The video has an cynical atheist agenda. Basically, the message of the video is that specific bible passages describe God using volcano-like imagery. Then the video asks you to consider that all the experiences of God were simply primitive people’s lack of understanding of volcanoes. And from there, there is no God since it was just a volcano. The point is to make you feel stupid if you still believe in God after seeing that all that they were witnessing was a volcano and attributed it to God. Atheists shaming you if you still believe after his clever point is made.
Of course, we have this same God (one God, the same God) described all over the old testament with many other images. We have God as a river, as the sun, as a King, as a voice who comes in a dream, etc.
If the ancients really thought that God was a volcano, would they also think he should be described in many other ways? Are the other ways to be taken literally?
Then in the NT we have God as a Dove, as a real person in Christ, as a lamb.
It is clear that nobody thought God was a volcano. They would have come out and said it.
Atheists are always looking for proof. So they read the text as providing evidence. But the text is a record of the oral traditions of people who kept their history as these stories so that the could remember where they came from and record their spiritual journey. They are free to use any imagery the wish to help them with the stories. They never claimed to be providing proof to a 2000 AD skeptic.