I think "I started playing video games and now feel fantastic and am more productive" could be generalized to "I allowed myself to unwind after my daily routine and now I feel fantastic and more productive"

Anecdotally, I've recently started playing TF2 again after work instead of exclusively working on a side-project, and I'll be damned if I haven't slept better in months and have had more creativity and stamina to put toward my projects after work. For me, the takeaway from Jack's post was to just make sure you're giving your brain enough time to recharge. and think about other things.