I know my voice is low in this video, people asleep as it is late when I recorded this.
This game is Portal by Valve on PC through Steam, a game in which you play as a woman who wanted to help this place called Aperture Science do tests with the new invention they had which were portals. These portals help the player progress through the tests. These tests are basically puzzles. Toward the middle of the game you get a Portal Gun that helps along the way. There is also a server bot that controls the whole facility and her name is GLaDoS. With this, the woman doing the test alternatively needs to find a way out of this place.