James Hoffman uses a Clever brewer to steep the coffee for about five minutes before letting it drip through its paper filter into a carafe with ice.
In the video, James mentions an Aeropress XL recipe to make about 3 cups, but the ratios and fundamental method would be the same for a Classic or Clear or Go. This recipe makes one cup (~250mL).
James Hoffman also recommends preheating the brewer in this technique, contrary to his ultimate Aeropress recipe.
Ratios for Immersion Iced Coffee (Using 75g/L)
1 Cup: 19g coffee, 165g hot water, 85g ice
2 Cups: 37.5g coffee, 330g hot water, 170g ice
3 Cups: 56.5g coffee, 495g hot water, 255g ice
4 Cups: 75g coffee, 660g hot brew water, 340g ice
Important: You have some flexibility on these. They don't need to be super precise. Ice isn't often sized compliantly.