[https://einthusan.tv/movie/watch/51MZ/?lang=hindi] can not be downloaded

[awei78]

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[Issue]
url:https://einthusan.tv/movie/watch/51MZ/?lang=hindi

Traceback (most recent call last):
  File "C:/Users/Administrator/Desktop/youtube_dl/__main__.py", line 19, in <module>
    youtube_dl.main()
  File "C:\Users\Administrator\Desktop\youtube_dl\__init__.py", line 452, in main
    _real_main(argv)
  File "C:\Users\Administrator\Desktop\youtube_dl\__init__.py", line 442, in _real_main
    retcode = ydl.download(all_urls)
  File "C:\Users\Administrator\Desktop\youtube_dl\YoutubeDL.py", line 1796, in download
    url, force_generic_extractor=self.params.get('force_generic_extractor', False))
  File "C:\Users\Administrator\Desktop\youtube_dl\YoutubeDL.py", line 696, in extract_info
    ie_result = ie.extract(url)
  File "C:\Users\Administrator\Desktop\youtube_dl\extractor\common.py", line 369, in extract
    return self._real_extract(url)
  File "C:\Users\Administrator\Desktop\youtube_dl\extractor\einthusan.py", line 70, in _real_extract
    ej_links = self._decrypt(video_data['EJLinks'], video_id)
TypeError: string indices must be integers

[Reason]
_VALID_URL = r'https?://einthusan\.tv/movie/watch/(?P<id>[0-9]+)'
can not adapter this url

[Rolution]
Modify _VALID_URL to:
_VALID_URL = r'https?://einthusan\.tv/movie/watch/(?P<id>\w+)'