Some say art is about, as stated already, putting a piece of yourself into your work and convey emotion. Some would say it's about simply creating something, irregardless of emotion.
Personally, I think art is a human concept and not an inherent natural one, and as such, is not real but rather some metaphysical entity that can only be percieved by a consciousness. And as for what is art and what is not, that depends upon the consciousness which will arbitrarily determine what is art based upon personal reasoning as there can be no objective reasoning.
Seeing as how some people have seen steaming piles of poo as art, because of the way they were formed and how they looked, then I can very much agree with you.
Art is about as loose a term as there is. Now Fine arts...
The thing that people argue about against video games as fine art is that and I quote from Film critic Roger Ebert, who has argued that games can never be art, as he claims "they lack the authorial control seen in film, and leave too much up to choice."
To me Video games redefine the fine arts. Yes they are an art. They are also a fine art. Just as people have the choice to see what they want to see and interpret how they want to interpret various art-forms like dance, paintings, music, movies, poetry etc etc a video game merely brings that control and choice to a new light and lets the Art be manipulated to a small extent. It is interactive art. There are also various other types of art-forms IN the Video game that constitutes art like you know, the textures and such. There is ART in the way a story unfolds in a game, there is ART in the way you perceive the in game world with various artistic depictions of trees, buildings, creatures, etc etc, there is ART in what you listen to as you play the game, there is ART in pretty much every aspect of any game you have ever played. Even Pong from like the 1970's was artistic in how it was made and played. The art of skill in the game.
Does choice ruin art? Has a chef who created a master piece in the culinary ARTS have his piece of art destroyed when someone chooses to eat it the way they feel like eating it? The consumer has the choice to eat it ow they want and interact with it. Even how and what angle to view it from.
So yeah, video games are not only art. They are in some ways the ultimate form of art.