Here's a related article from June by Peter Suderman on video games that posit that they "offer a sort of universal basic income for the soul."
And here's an article by Robert VerBruggen laying out this topic alongside a discussion of the effect of competing immigrant labor on this age group. VerBruggen mentions the point that TV watching is still a much larger share of leisure time than video games even for young men.
One could presumably test these competing hypotheses, maybe by looking at geographic variation. Patterns in competing labor surely vary across space, and for that matter, the depth and duration of the Great Recession also varied across space, but prices and quality of video gaming probably only vary across time. It would also be possible although maybe a little dicey to look at classes of labor by education. It is well known that if U.S. immigration has an economic impact, it tends to be felt by less educated natives.