The length cap for storyboards and videos works in two ways; there is a cap on the number of slides you can use and a cap for the total length of the generated video.
The cap is dependent on the type of account that you have – for non-license accounts, the cap is a maximum of 120 slides and a total running time of 4 minutes. The cap for all License accounts is a maximum of 120 slides and 12 minutes.
You will see a warning at the length indicator on the storyboard if your storyboard is over the cap. Then the "Generate" function will be disabled, but you can still work with your storyboard and trim it down accordingly so you can continue your script work without interruption.
Not sure if you have access to this feature?
Check out what's included in your plan or contact our support.