This is the first time Yahtzee has made himself look like a moron, I think hes ego has gotten the better of him.
Videogames are not art for one simple reason, videogames are directly participatory, as such they are entertainment. If an artist relinquishes his art to free tampering by the audeince he is no longer an artist.
When an artist creates a piece of work everything has an implication and the audience simply observe, this immutability allows us to enter the mind and world of the artist.
Videogames remove this immutability, allowing the audience to interact with the world and story, cheapening them by revealing that they are an illusion we can manipulate. As such videogames kill the connection between character and story.
The reason confusion exists is because artists create games, you have concept artists, graphic designers, writers, composers, etc. As such games have artistic elements but the nature of the videogame - the audience being able to edit, change or omit elements of the creation remove the connection with what art is meant to be.
Think of graphics painted on a car, the graphics are art, is the car art ?
The car was created to serve the purpose of transporting people, and does this as always intended.
To claim games are art is to claim that pong or asteroids are also art, as todays games are made to serve the same desires that were being served when they were created.
If one looks at the history of film, since its origins it was artistic in vision and design, films like Nosferatu and Metropolis are evidence of this.
Yahtzees definition of art is so far beyond stupidity I would have fired him if I were the baws. "My personal definition of art is something that provokes emotional attachment."
By this logic beating a woman is art, so is watching your team win the world cup, and going to a gig of a kick ass band.