text: Title: [BUG] Videoclips  are too short for the actual script and stop at a still image.
  Body: **Describe the bug**
  In a video I generated most of the clips are too short and stop playing although the text/voice continues. Only after a new "paragraph" a new clip is loaded. The result is a still image until the paragraph is finished.
  
  **Expected behavior**
  The next clip is played when the previous one finishes instead of just stopping at a still image.
  
  **Screenshots**
  Sample video:
  https://drive.google.com/file/d/1h_MSsMkskG3aUy775u0MRUgSiNBLQwO1/view
  
  **Desktop (please complete the following information):**
   - OS: Windows
   - Browser Firefox
   - Python Version 3.11
  
  