[BUG] [Video is not downloaded properly]

[studiousamateur]

Context

• OS: [Windows 10]
• Install method: [Manual method]
• Your location: [outside campus]
• Course URL: [https://a.impartus.com/ilc/#/course/1429338/706]
• Lecture range: ["ALL"]

Additional context

Describe the bug
Only the first video got downloaded. But it was incomplete.

1. The length of video was 1 hr, while infact it should be 2 hrs
2. Video was not visible.
3. Only 9 minutes of audio was playable post which it stopped and jumped direct to end of video.
4. Rest of videos did not get downloaded. Pasted the program output below.

Screenshots
If applicable, add screenshots to help explain your problem.

Program output

Click to see output

Saving to "Impartus Lectures\S2-20_DSECL_DL_SEC_2 WILP Session"
Downloading lecture numbers: 1 2 3 4 5 6
Processing 01. Perceptron And MLP 2021-05-15.mkv
Extracting encryption keys for angle 1
Extracting encryption keys for angle 2
Downloading using ffmpeg
Downloaded 01. Perceptron And MLP 2021-05-15.mkv
Processing 02. No Topic Entered 2021-05-22.mkv
Processing 03. MLP Numericals 2021-05-29.mkv
Processing 05. No Topic Entered 2021-06-12.mkv
<class 'requests.exceptions.ConnectionError'> HTTPSConnectionPool(host='a.impartus.com', port=443): Max retries exceeded with url: /api/fetchvideo?ttid=5824083&token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6MTE1MDkzNiwiZXVsYSI6MSwiaW5zdGl0dXRlSWQiOjEyMDQsInVzZXJUeXBlIjo2LCJpYXQiOjE2MjQ2MzAxNjYsImV4cCI6MTYyNTIzNDk2Nn0.VzzMWZXDrkbdoujWaCEQC1LvrZ-6_DoDdD33CZpQoBk&type=index.m3u8 (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x000002712276D948>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')) <traceback object at 0x000002712276D1C8>
Traceback (most recent call last):
  File "C:\Users\Admin User\AppData\Local\pypoetry\Cache\virtualenvs\ilc-scraper-HTX1gs7S-py3.7\lib\site-packages\urllib3\connection.py", line 160, in _new_conn
    (self._dns_host, self.port), self.timeout, **extra_kw
  File "C:\Users\Admin User\AppData\Local\pypoetry\Cache\virtualenvs\ilc-scraper-HTX1gs7S-py3.7\lib\site-packages\urllib3\util\connection.py", line 61, in create_connection
    for res in socket.getaddrinfo(host, port, family, socket.SOCK_STREAM):
  File "c:\users\Admin User\appdata\local\programs\python\python37\lib\socket.py", line 752, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno 11001] getaddrinfo failed

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\Admin User\AppData\Local\pypoetry\Cache\virtualenvs\ilc-scraper-HTX1gs7S-py3.7\lib\site-packages\urllib3\connectionpool.py", line 677, in urlopen
    chunked=chunked,
  File "C:\Users\Admin User\AppData\Local\pypoetry\Cache\virtualenvs\ilc-scraper-HTX1gs7S-py3.7\lib\site-packages\urllib3\connectionpool.py", line 381, in _make_request
    self._validate_conn(conn)
  File "C:\Users\Admin User\AppData\Local\pypoetry\Cache\virtualenvs\ilc-scraper-HTX1gs7S-py3.7\lib\site-packages\urllib3\connectionpool.py", line 978, in _validate_conn
    conn.connect()
  File "C:\Users\Admin User\AppData\Local\pypoetry\Cache\virtualenvs\ilc-scraper-HTX1gs7S-py3.7\lib\site-packages\urllib3\connection.py", line 309, in connect
    conn = self._new_conn()
  File "C:\Users\Admin User\AppData\Local\pypoetry\Cache\virtualenvs\ilc-scraper-HTX1gs7S-py3.7\lib\site-packages\urllib3\connection.py", line 172, in _new_conn
    self, "Failed to establish a new connection: %s" % e
urllib3.exceptions.NewConnectionError: <urllib3.connection.HTTPSConnection object at 0x000002712276D948>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\Admin User\AppData\Local\pypoetry\Cache\virtualenvs\ilc-scraper-HTX1gs7S-py3.7\lib\site-packages\requests\adapters.py", line 449, in send
    timeout=timeout
  File "C:\Users\Admin User\AppData\Local\pypoetry\Cache\virtualenvs\ilc-scraper-HTX1gs7S-py3.7\lib\site-packages\urllib3\connectionpool.py", line 727, in urlopen
    method, url, error=e, _pool=self, _stacktrace=sys.exc_info()[2]
  File "C:\Users\Admin User\AppData\Local\pypoetry\Cache\virtualenvs\ilc-scraper-HTX1gs7S-py3.7\lib\site-packages\urllib3\util\retry.py", line 439, in increment
    raise MaxRetryError(_pool, url, error or ResponseError(cause))
urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='a.impartus.com', port=443): Max retries exceeded with url: /api/fetchvideo?ttid=5824083&token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6MTE1MDkzNiwiZXVsYSI6MSwiaW5zdGl0dXRlSWQiOjEyMDQsInVzZXJUeXBlIjo2LCJpYXQiOjE2MjQ2MzAxNjYsImV4cCI6MTYyNTIzNDk2Nn0.VzzMWZXDrkbdoujWaCEQC1LvrZ-6_DoDdD33CZpQoBk&type=index.m3u8 (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x000002712276D948>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed'))

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "ilc_scrape.py", line 347, in <module>
    main()
  File "ilc_scrape.py", line 337, in main
    pool.starmap(download_stream, task_args)
  File "c:\users\Admin User\appdata\local\programs\python\python37\lib\multiprocessing\pool.py", line 276, in starmap
    return self._map_async(func, iterable, starmapstar, chunksize).get()
  File "c:\users\Admin User\appdata\local\programs\python\python37\lib\multiprocessing\pool.py", line 657, in get
    raise self._value
  File "c:\users\Admin User\appdata\local\programs\python\python37\lib\multiprocessing\pool.py", line 121, in worker
    result = (True, func(*args, **kwds))
  File "c:\users\Admin User\appdata\local\programs\python\python37\lib\multiprocessing\pool.py", line 47, in starmapstar
    return list(itertools.starmap(args[0], args[1]))
  File "D:\Study\ilc-scraper-master\downloader.py", line 164, in download_stream
    variant_pls = get_variant_playlist(stream_url, quality)
  File "D:\Study\ilc-scraper-master\downloader.py", line 81, in get_variant_playlist
    variants = get_variants(stream_url)
  File "D:\Study\ilc-scraper-master\downloader.py", line 71, in get_variants
    resp = requests.get(stream_url)
  File "C:\Users\Admin User\AppData\Local\pypoetry\Cache\virtualenvs\ilc-scraper-HTX1gs7S-py3.7\lib\site-packages\requests\api.py", line 76, in get
    return request('get', url, params=params, **kwargs)
  File "C:\Users\Admin User\AppData\Local\pypoetry\Cache\virtualenvs\ilc-scraper-HTX1gs7S-py3.7\lib\site-packages\requests\api.py", line 61, in request
    return session.request(method=method, url=url, **kwargs)
  File "C:\Users\Admin User\AppData\Local\pypoetry\Cache\virtualenvs\ilc-scraper-HTX1gs7S-py3.7\lib\site-packages\requests\sessions.py", line 530, in request
    resp = self.send(prep, **send_kwargs)
  File "C:\Users\Admin User\AppData\Local\pypoetry\Cache\virtualenvs\ilc-scraper-HTX1gs7S-py3.7\lib\site-packages\requests\sessions.py", line 643, in send
    r = adapter.send(request, **kwargs)
  File "C:\Users\Admin User\AppData\Local\pypoetry\Cache\virtualenvs\ilc-scraper-HTX1gs7S-py3.7\lib\site-packages\requests\adapters.py", line 516, in send
    raise ConnectionError(e, request=request)
requests.exceptions.ConnectionError: HTTPSConnectionPool(host='a.impartus.com', port=443): Max retries exceeded with url: /api/fetchvideo?ttid=5824083&token=eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJpZCI6MTE1MDkzNiwiZXVsYSI6MSwiaW5zdGl0dXRlSWQiOjEyMDQsInVzZXJUeXBlIjo2LCJpYXQiOjE2MjQ2MzAxNjYsImV4cCI6MTYyNTIzNDk2Nn0.VzzMWZXDrkbdoujWaCEQC1LvrZ-6_DoDdD33CZpQoBk&type=index.m3u8 (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x000002712276D948>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed'))