docstr: st.video(None) is not an error.
docstr_tok: ["st.video","(","None",")","is","not","an","error","."]
code: def test_st_video_from_none(self):
      """st.video(None) is not an error."""
      st.video(None)
      el = self.get_delta_from_queue().new_element
      self.assertEqual(el.video.url, "")
  
file_path: streamlit/lib/tests/streamlit/elements/video_test.py
imports: from io import BytesIO
  import numpy
  import streamlit
  from streamlit.runtime.media_file_storage import MediaFileStorageError
  from streamlit.runtime.memory_media_file_storage import _calculate_file_id
  from streamlit.web.server.server import MEDIA_ENDPOINT
  from tests.delta_generator_test_case import DeltaGeneratorTestCase
label_desc: Use image node_id 5 for calling the VideoTest obj's underlying member method code with example usage: obj.test_st_video_from_none() without return types