Update tools.py

tools.py

@@ -170,7 +170,7 @@ def create_video_from_images_and_audio(images_dir, speeches_dir, final_video_fil
     
     final_clip = concatenate_videoclips(clips)
     if not final_video_filename.endswith('.mp4'):
-    final_video_filename = final_video_filename + '.mp4'
+        final_video_filename = final_video_filename + '.mp4'
     final_clip.write_videofile(final_video_filename, codec='libx264', fps=24)
     
     # Close all video files properly