It should start around 44:45 when Luis and Gaby find the line, blow out their opponent's board, and then the both of them comment that their mono-blue Baral/Murmuring Mystic 14-hits-for-Augur-of-Bolas is the purest form of a Cube deck. And the Legacy Cube is, in my mind, like a Riptide Cube that's given up a little bit of function for a more exciting experience. And they were playing honest Magic with reasonable spells.