Yeah it's a Werewolf/Mafia style social deduction game, the objective is for the Crewmates to work together to find out the imposters in the group and eliminate them, whilst the imposter try to avoid detection, sow chaos between the group and slowly pick off the team one by one. The difference between this and regular Werewolf/Mafia is the games night phase has the Crewmates trying to complete tasks so they can escape whilst gathering information on their fellow teammates, and the imposters try to find the perfect moment to sabotage and kill of the crew without being spotted in the process.
Trump (Not that one) had a good video showing playing both Crewmate and Imposter. The Danganronpa music insertion helps as well.