The footage has been recorded by a former KGB agent. This agent was asked to record the investigation, and that’s what he got. He went to a secret underground base, and once he managed to get inside, he noticed a lot of locked doors. There were many strange sounds, according to him, of some unrecognizable creatures.
So he finally entered the room where the extraterrestrial had been kept. The individuals around him offered him protective suits and assured him that there was no danger.
When he reached the alien, he could hear the voice of the alien in his head, asking him to contact his superior, and take him – the alien – out of the prison where he was kept.
The captured alien was scared, and probably the staff of the base hurt him, remember the Alien Interview of the Blue Book Project. Imagine what he felt when he was captured on another planet.
These beings could only be us from the future, and we should treat them decently, considering that we have re-engineered their technology.
Below is a video of this. You’ll see the alien at 8:30