Merge pull request #57 from ManimCommunity/fix-scene-file-writer

Fix scene_file_writer import

Author: leotrs

manim/scene/scene_file_writer.py

@@ -69,7 +69,7 @@ def init_output_directories(self):
         module_directory = self.output_directory or self.get_default_module_directory()
         scene_name = self.file_name or self.get_default_scene_name()
         if self.save_last_frame or self.save_pngs:
-            if consts.VIDEO_DIR != "":
+            if VIDEO_DIR != "":
                 image_dir = guarantee_existence(os.path.join(
                     VIDEO_DIR,
                     module_directory,