Weiss clearly didn't understand video games.
In a rare instance of boredom, Weiss decided to lie next to Ruby on her bed to get a better look at the game Ruby was playing. Bright lights repeatedly flashed on her scroll as Ruby nonsensically mashed every button she had available to her. Weiss had no idea what was happening.
Weiss never had much interest in video games; they seemed like a waste of time. Yet, Ruby seemed to have a lot of fun with them. Maybe Ruby should show her how to play sometime, just to see what she was missing.