Embodiments of the present application disclose a method and apparatus for determining an object adding mode, an electronic device and a medium. A specific implementation of the method includes: obtaining a target video and a to-be-added object set to be added to a target video; determining time periods corresponding to storyboards of the target video; determining a presentation period of a to-be-added object in the to-be-added object set in the target video based on the time periods corresponding to the storyboards; generating object adding indication information based on the determined presentation period, where the object adding indication information includes time prompt information used to indicate the presentation period of the to-be-added object in the to-be-added object set in the target video. According to this implementation, automatic selection of time for adding the to-be-added object to the target video is realized.