I don't think it matters if they game or not. They'll only understand the concept of it if they do game but it's not the game that bothers them, it's the idea that sometimes the game is "more important" than them.

I live with my boyfriend, he games but doesn't raid anymore so he gets it, but there are times I get home from work after him and jump straight on the PC for raid (7pm till 9:30pm) and I can tell it bothers him every now and then. Though I offer to cancel all the time and he says he "doesn't mind". It does. Sometimes he wants to just come home, us cook a meal together and relax in front of the tv after a crap day of work. Which we do when I don't have raid (raid 2 days a week mid-week and sunday night).

Sometimes it really sucks saying "I can't tonight, I've got raid." I'd said that a few times. And I feel incredibly guilty about it.

There are obviously scenarios where he plays PvP in WOW or Overwatch etc and he gets insanely angry and I literally don't understand how anyone could get that annoyed by a game (and I play competitive stuff as well but never mega-rage). And he can't learn to come off when it's not going well and stressing him out. But that's just his thing, like raiding is my thing.

In terms of this video, we hardly know the context. But, there's clearly a reason why she can't move her car and there's a tow truck outside and she's worried about her car being taken away and he's sat at his PC playing a game and laughing with his mates. As FFXIV players (and raiders) we understand you can't just drop shit mid-fight but at the same time. What's a wipe and going outside for 5 mins to sort out whatever she's upset about?

Or she could just be someone who throws tantrums and is being super unreasonable xD But no-one apart from the couple know the context.

edit Playing devil's advocate, say there was a tow truck outside and your partner needs you to move it and you're in the middle of the raid. Would you really make your partner wait 10 mins? Or would you just say "sorry team, brb 5-10 mins". We need to remember that RL does have a priority over games sometimes and that while it sucks to make 7 other people wait because of some RL stuff, sometimes you gotta make 7 people wait. I raid with adults, so sometimes stuff comes up RL where raid has to stop for 30 mins or whatever. It's life.