I'll try to understand the answers in this video 1991

It was 1991. A group of Soviet scientists were trying to understand the phenomenon they were observing. One of those asking questions was Academician Vsevolod Troitsky.

2:31 Question: What planet are you from?

Answer: We are not from a planet. We are a cosmic intelligence. We are everywhere, and we have access to different planets in different galaxies.

4:38 Will humanity be able to understand the one God?

Answer: It won't be able to until it ceases to be humanity. That will happen in the 22nd century.
(I think this is a hint at the creation of super AI in the 22nd century, which will unlock the secrets of matter.)

Question: Tell me about other civilizations

Answer: There are about 8,000 more advanced civilizations in your dimension. There are many civilizations that have destroyed themselves. There are only three civilizations similar to yours, and you won't be able to contact them by radio due to the extreme distance.

32:00 Not all civilizations need an atmosphere on planets; most do not need an atmosphere.

34:00 There are a lot of civilizations in your galaxy, but you can't detect them (practically can't).

36:00 Question: Is the principle of UFO movement based on gravitational energy?

Answer: It's close. This energy will be discovered in 12 years.
(Probably referring to dark energy. In 2003, a very important step in confirming the existence of dark energy and its dominance in the Universe occurred: Data from the WMAP satellite (the first year of observations was published in 2003) provided independent confirmation of the accelerating expansion through measurements of the cosmic microwave background (CMB).
WMAP allowed us to precisely determine the composition of the Universe: ≈73% dark energy, ≈23% dark matter, and ≈4% ordinary matter. It was in 2003 that the idea of ​​dark energy went from being an “interesting hypothesis” to being a generally accepted part of the standard cosmological model ΛCDM, and the accelerated expansion ceased to be controversial.)

I'm stopping at 37 minutes and going to read about dark energy. I'll continue watching the video later.