At the moment, it's not possible to change the duration of the videos in the personal program.
We offer a variety of exercises in Dancebit: some are 7-10 min long, and some last 20 min. The duration depends on your chosen level: the more complex the challenge, the longer the exercise.
Still, the idea is to select several videos and combine them into a single training session that can last as long as you wish. Feel free to explore our Workouts tab for more content: