I totally agree that if there is not a repeating monthly pattern (which can generally be influenced/improved by dietary and exercise choices), then the described behavior may be related to adolescent changes which affect both genders.

For anyone looking for more information, here is one source: Maturation of the adolescent brain, by National Center for Biotechnology Information (NCBI), National Library of Medicine (NLM), National Institutes of Health (NIH).

My main point was that while screen time may be a trigger, there may be underlying factors: screen time may not be the root cause of the behavior.