The YouTube video shows a brief overview of all Super Units. The commentator sadly missinterpreted the intented gameplay of this mod, so please ignore all statements like: "Build a complete control group of these things and you have won the game." Furthermore he explained some of the abilities incorrect and missed the purpose of the Mothership and its main ability (Shield Induction).
Nevertheless I am greatful for this video as it gives you the opportunity to see SC SUM in action.
Have fun!