code: def is_transcript_available(video_id, language_code=None):
      
      filter_attrs = {'video__edx_video_id': video_id}
      if language_code:
          filter_attrs['language_code'] = language_code
  
      transcript_set = VideoTranscript.objects.filter(**filter_attrs)
      return transcript_set.exists()
docs: Returns whether the transcripts are available for a video.
  
      Arguments:
          video_id: it can be an edx_video_id or an external_id extracted from external sources in a video component.
          language_code: it will the language code of the requested transcript.