This study is a pilot-level experimental study to determine whether watching landscape videos induces emotional and physiological improvement effects in subjects experiencing post-traumatic stress (PTSD) due to COVID-19. Post-traumatic stress subjects were selected using a structured questionnaire from a clinical psychology expert. The image used as a stimulating tool was an ultra-high-definition image (4K) taken for experiments abroad and domestically, and UHD-TV was used.The treatment of the stimulus video (filming and editing conditions, video experiment conditions) applied the video design of the Screen Therapy research team conducted from 2019 to 2021. The subjects were provided with a four-week video viewing experience, and data analysis was attempted by measuring the pre- and post-written questionnaires and EEG biosignals. The results of the ‘resilience’ measurement, a self-report questionnaire, showed that the average value after the test increased compared to the test beforehand, but it was not statistically significant. As a result of measuring brain wave biosignals, it was confirmed that the alpha wave level in the left brain was high enough to show a statistically significant difference between the alpha (Absolute Aplha) waves in the T3 and T4 regions, which are the temporal lobes of the left and right brains, during the preliminary measurement. However, after watching the video for 4 weeks, a decrease in alpha wave levels in the left hemisphere was confirmed, and the average alpha wave levels in each region of the left and right brains T3 and T4 were at similar levels and the values were balanced. This study is significant in that it discovered the possibility that watching videos can help reduce the imbalance between the left and right brain, which is one of the physiological problems of individuals experiencing emotional difficulties such as post-traumatic stress. In particular, it were able to see how the method of using video content of mixed landscape images as a mental image to replace painful memory images could have an impact on the post-traumatic trauma clinical group.