Great video, and this is how I think about it, too. Last week I was going to be out of town for all but 2 days. I played aggro decks, and if I wasn't winning at 4 mana, I conceded (make sure your opponent also has 4 mana). It was easy to win enough games to stay in mythic (playing lots of random fun decks), and my average time per game was really short (maybe near that 5-minute mark on average). I got all my games in, and that's the only time this event has ever felt like a grind.
Normally, you'll easily hit 60 games playing an hour a day. If you hate this game, maybe that sounds terrible, but assuming you're playing because you enjoy it, it's basically free money.