Like, over and over. I watched Giant Bomb's quick look at least four times, in its entirety. But there's more, man. There's so much more.
I did a YouTube search for Galak-Z and tightened up the search criteria to the past week, and every major western site (save GameTrailers, oddly) has great big chunks of original footage. It's a bit like that crazy weekend I spent watching streamers play Darkest Dungeon before the early access finally went live. If you're down with Galak-Z (or just Galak-curious), check it out.
First up, Polygon - for the gamer hipster in you.
Second, GameSpot with a measly five minutes.
And finally, thirty awesome minutes with IGN.