code: def setUpClass(cls):
      cls.maxDiff = None
      cls.config, cls.local_vid_path, vid_file = cls.download_video(0)
  
file_path: AugLy/augly/tests/video_tests/base_unit_test.py
imports: import filecmp
  import os
  import tempfile
  import unittest
  from typing import Any, Callable, Dict, List, Optional, Tuple
  from augly.tests import VideoAugConfig
  from augly.utils import pathmgr, TEST_URI
label_desc: Use image node_id 3 for calling the BaseVideoUnitTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types