I'm just a beginner since I've been meditating for only 8 years but from my experience, most video games involve at least one of the following:
- ego
- loosing track of time
- loosing track of physical reality, such as bodily sensations
- reacting
- desiring an outcome
- judging
Not all of them, and not for all video games. But any of those characteristic seems to be something quite antagonist with mindfulness.
Now somebody that is very focused, very selfless and equanimous in a competitive game will have something close to meditation. But first they are rare, and secondly the very existence of the game, being virtual and... a game, seems to be orthogonal the mindful state state.
I'm not a competitive player though, and:
- when I play dota I react A LOT.
- when I'm coding or watching a movie, I completely forget reality.
It contrast a lot with my meditation practice. Maybe some people are better at dealing with screens that I am.