A method for video editing, comprising: at a computer system that is in communication with a display generation component: playing, via the display generation component, a portion of a video that includes a first subject emphasis change that occurs at a first time, wherein the first subject emphasis change includes a change in appearance of visual information captured by one or more cameras to emphasize a respective subject relative to one or more elements in the video during a first period of time that follows the first time; after playing the portion of the video that includes the first subject emphasis change that occurs at the first time, detecting a request to change subject emphasis in the video, the change of subject emphasis being at a second time in the video that is different from the first time; and in response to detecting the request to change subject emphasis at the second time in the video: changing the subject emphasis in the video during a second period of time that follows the second time; in accordance with a determination that the first subject emphasis change that occurs at the first time is an automatic change in subject emphasis, changing, by updating or removing, the first subject emphasis change that occurs at the first time including changing the emphasis of the respective subject relative to the one or more elements in the video during the first period of time that follows the first time, wherein the automatic change in subject emphasis at the first time is a change in subject emphasis that is not generated in response to an explicit user input to generate a subject emphasis change at the first time; and in accordance with a determination that the first subject emphasis change that occurs at the first time is a user-specified change in subject emphasis, forgoing changing the first subject emphasis change that occurs at the first time, wherein the user-specified change in subject emphasis at the first time is a change in subject emphasis at the first time that is generated in response to an explicit user input to generate a subject emphasis change at the first time. playing, via the display generation component, a portion of a video that includes a first subject emphasis change that occurs at a first time, wherein the first subject emphasis change includes a change in appearance of visual information captured by one or more cameras to emphasize a respective subject relative to one or more elements in the video during a first period of time that follows the first time; after playing the portion of the video that includes the first subject emphasis change that occurs at the first time, detecting a request to change subject emphasis in the video, the change of subject emphasis being at a second time in the video that is different from the first time; and in response to detecting the request to change subject emphasis at the second time in the video: changing the subject emphasis in the video during a second period of time that follows the second time; in accordance with a determination that the first subject emphasis change that occurs at the first time is an automatic change in subject emphasis, changing, by updating or removing, the first subject emphasis change that occurs at the first time including changing the emphasis of the respective subject relative to the one or more elements in the video during the first period of time that follows the first time, wherein the automatic change in subject emphasis at the first time is a change in subject emphasis that is not generated in response to an explicit user input to generate a subject emphasis change at the first time; and in accordance with a determination that the first subject emphasis change that occurs at the first time is a user-specified change in subject emphasis, forgoing changing the first subject emphasis change that occurs at the first time, wherein the user-specified change in subject emphasis at the first time is a change in subject emphasis at the first time that is generated in response to an explicit user input to generate a subject emphasis change at the first time. changing the subject emphasis in the video during a second period of time that follows the second time; in accordance with a determination that the first subject emphasis change that occurs at the first time is an automatic change in subject emphasis, changing, by updating or removing, the first subject emphasis change that occurs at the first time including changing the emphasis of the respective subject relative to the one or more elements in the video during the first period of time that follows the first time, wherein the automatic change in subject emphasis at the first time is a change in subject emphasis that is not generated in response to an explicit user input to generate a subject emphasis change at the first time; and in accordance with a determination that the first subject emphasis change that occurs at the first time is a user-specified change in subject emphasis, forgoing changing the first subject emphasis change that occurs at the first time, wherein the user-specified change in subject emphasis at the first time is a change in subject emphasis at the first time that is generated in response to an explicit user input to generate a subject emphasis change at the first time.