Like everything it has it's good sides and bad. Studies does show it improve kids hand eye coordination, and it can make you smarter depending on what type of games you play.
Other studies also shows it bad side, it makes kids more aggresive and that it's very addictive people do get sucked into it and some will forget to eat , drink and sleep.
Like most things in life it's good but to much of it can be bad.
It's an interesting video. The speaker focuses on the positive effects of gaming on the brain, such as improved spatial reasoning, attention-span and eyesight.
However, she likens gaming to red wine in that small amounts consumed reasonably frequently are healthy but excessive use can be detrimental.