This is the Preservation Ending, one of the good endings of QSERF (Quantum Science Energy Research Facility), done in Tier 1. There are multiple endings to this game, and only one of them is canon. Personally, after watching the cutscene of this ending, I wished this was the canon ending. (SPOILER: It wasn't.)
The Preservation Ending can be done by completing the nightshift taking place in-game (QSERF is very heavy with lore, but I can't really go into that right now) without destroying the facility. To complete the nightshift, you'll need to complete the power order tasks from the control room of the DMR (Dark Matter Reactor) until the nightshift ends.
You will receive a large amount of Electrons (the currency in QSERF) at the end of the nightshift, depending on how many tasks are done, from tiers 1-3.
Umbrex, an admin of QSERF, also makes a brief cameo appearance at the beginning of the video! They were with us when the nightshift ended.