How will big Formula 1 teams suffer most from the budget cap?

With the cost cap set to take force next year in 2021, the big teams in Formula 1 will have to cut costs down severely to stay underneath the cap and avoid any penalties. Former McLaren mechanic Marc Priestley explains how the big teams are spending big now to cut costs next year and which departments of teams are most impacted by the cap. His explanation starts at 4:50!