© 2014. Complex healthcare, less resources, high-level medical equipment, and fewer available clinical settings have led many health professionals to use simulation as a method to further augment educational experiences for nursing students. While debriefing is recommended in the literature as a key component of simulation, the optimal format in which to conduct debriefing is unknown. This pre- and posttest two-group randomized quasi-experimental design compared the effectiveness of video-assisted oral debriefing (VAOD) and oral debriefing alone (ODA) on behaviors of 48 undergraduate nursing students during high-fidelity simulation. Further, this study examined whether roles (e.g., team leader, medication nurse), type of scenarios (i.e., pulmonary and cardiac scenarios), and student simulation team membership (i.e., VAOD and ODA groups) influenced these behaviors. Behaviors observed in this study related to patient safety, communication among team members, basic- and problem-focused assessment, prioritization of care, appropriate interventions, and delegation to healthcare team members. Both human patient simulator practice and guidance using video-assisted oral debriefing and oral debriefing alone appeared to be comparable regarding behaviors, regardless of roles, type of scenarios, and student simulation team membership. These findings suggest that nurse educators may use either video-assisted oral debriefing or oral debriefing alone to debrief undergraduate nursing students during high-fidelity simulation.