Entertainment and, too a certain extent, art.
It may rely on what you call art and it may seem like only entertainment but when you watch a movie you may be entertained but you are also appreciating all the little things it offers. The story, the character development, and hell, even for just the pretty explosions. Do you do the same thing with video games? Of course you do. Unless you enjoy pain and playing only to slowly kill yourself, in which case, I won't judge.
It may rely on what you call art and it may seem like only entertainment but when you watch a movie you may be entertained but you are also appreciating all the little things it offers. The story, the character development, and hell, even for just the pretty explosions. Do you do the same thing with video games? Of course you do. Unless you enjoy pain and playing only to slowly kill yourself, in which case, I won't judge.