Purpose: This study aimed to provide data for more effective debriefing methods by understanding and describing the meaning of specific and realistic experiences of learners using video-based team debriefing in nursing simulation training. Methods: Data were collected through focus group interviews using semi-structured questions with seven senior nursing students who had completed a nursing simulation practicum course between September 22 and October 2, 2025. Data were analyzed using phenomenological techniques outlined by Colaizzi(1978). Results: Twelve theme clusters and five categories were derived from the data. They were classified into the following 5 categories: immersed in debriefing; constraints on debriefing; re-evaluating oneself as a prospective nurse; growing collaboration and interpersonal skills; and growing confidence in nursing problem-solving. Conclusion: Learners who experienced video-based team debriefing during nursing simulation training effectively reflected on their practical nursing activities and desired more in-depth debriefing. Furthermore, it effectively enhanced nursing competencies of communication, teamwork, collaboration, and confidence. However, performance evaluations and team members’ personalities hampered the smooth progress of the debriefing. This suggests that the proposed method can serve as a foundation for the development of debriefing methods.