Afaik seedance only has like three modes of generation: 1. Text to video 2. First frame + text to video 3. First frame + last frame + text to video From what I've seen you can do ranges of time in the text for certain things like 1-3s: slow pan in etc. People will use something like Google's nano banana to generate still frames in a storyboard-like prompt then have seedance generate the video for each 12 or so second portion