I would Guess But it is just my Guess.because some video games contain sinful themes like sexual or bloody themes. But video games in them Self are probably not sinful. Though in early christianity many of the great priests and theologians even considered Theatre to be sinful. But I Think that is a Little bit too legalistic. But maybe itr depends on what Theatre it is
This is how i understand it
If video games can help you out as a person, then they are useful, if they start to turn into a betrayal of Christ than you need to drop that game.
I think a great deal of discernment is required, to be able to observe the movement of your heart, on the one hand you don't want to be one of those lunatics who think everything is unclean and evil, St Paul rebukes these people very harshly, for example when muslims see a swine they get very offended, this is a state of extreme delusion. There is also the complete opposite case, which is of neglectance and sloppiness, this is also not good.
But if Christ is always at the top of your heart and your consciences is ok, then give thanks to the Lord for all the goods you are given.
I hope i am not wrong, but i think video games are good for me, when i come home from work, instead of thinking about troublesome things and fall into depression, i strategize my way to victory, pew pew