Here is a detailed description of the video: The video shows a stage presentation taking place in what appears to be an auditorium or theater

Here is a detailed description of the video: The video shows a stage presentation taking place in what appears to be an auditorium or theater. A large screen displays the title of the performance: "情景剧《物证搜索展》," which translates to "Situation Drama 'Evidence Search Exhibition'," along with the organization's name: "大兴分局刑侦支队警犬管理中队," which translates to "Daxing Branch Criminal Investigation Detachment Police Dog Management Detachment." The stage is brightly lit with a red carpet. On stage, three men in black uniforms, likely representing law enforcement officers, are walking in a formation. A fourth man walks with them, holding a police dog on a leash. The dog appears to be trained for evidence searching, possibly for detecting specific scents. The audience is seated and facing the stage. Most of the people are looking at the performance, and some are holding up their phones to record videos or take pictures. The auditorium is filled with rows of seats, and the lighting is mostly red and blue, providing a dramatic atmosphere for the performance. The event seems to be aimed at educating or demonstrating the work of the criminal investigation team with police dogs.