Repository: youtube-dl
Issue: Hotstar downloading error
Labels: cant-reproduce

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## Checklist

<!--
Carefully read and work through this check list in order to prevent the most common mistakes and misuse of youtube-dl:
- First of, make sure you are using the latest version of youtube-dl. Run `youtube-dl --version` and ensure your version is 2020.12.31. If it's not, see https://yt-dl.org/update on how to update. Issues with outdated version will be REJECTED.
- Make sure that all provided video/audio/playlist URLs (if any) are alive and playable in a browser.
- Make sure that all URLs and arguments with special characters are properly quoted or escaped as explained in http://yt-dl.org/escape.
- Search the bugtracker for similar issues: http://yt-dl.org/search-issues. DO NOT post duplicates.
- Finally, put x into all relevant boxes (like this [x])
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- [x] I'm reporting a broken site support
- [x] I've verified that I'm running youtube-dl version **2020.12.31**
- [x] I've checked that all provided URLs are alive and playable in a browser
- [x] I've checked that all URLs and arguments with special characters are properly quoted or escaped
- [x] I've searched the bugtracker for similar issues including closed ones


## Verbose log

<!--
Provide the complete verbose output of youtube-dl that clearly demonstrates the problem.
Add the `-v` flag to your command line you run youtube-dl with (`youtube-dl -v <your command line>`), copy the WHOLE output and insert it below. It should look similar to this:
 [debug] System config: []
 [debug] User config: []
 [debug] Command-line args: [u'-v', u'http://www.youtube.com/watch?v=BaW_jenozKcj']
 [debug] Encodings: locale cp1251, fs mbcs, out cp866, pref cp1251
 [debug] youtube-dl version 2020.12.31
 [debug] Python version 2.7.11 - Windows-2003Server-5.2.3790-SP2
 [debug] exe versions: ffmpeg N-75573-g1d0487f, ffprobe N-75573-g1d0487f, rtmpdump 2.4
 [debug] Proxy map: {}
 <more lines>
-->

```

youtube-dl -v "https://www.hotstar.com/in/tv/saanjher-baati/1260007251/chinis-innocent-demand/1000256251"
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://www.hotstar.com/in/tv/saanjher-baati/1260007251/chinis-innocent-demand/1000256251']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2020.12.31
[debug] Python version 3.4.4 (CPython) - Windows-2012ServerR2-6.3.9600
[debug] exe versions: ffmpeg N-92391-g07bc603757
[debug] Proxy map: {}
[hotstar] 1000256251: Downloading webpage
[hotstar] 1000256251: Downloading JSON metadata
ERROR: 1000256251: Failed to parse JSON  (caused by ValueError('Expecting value:
 line 1 column 1 (char 0)',)); please report this issue on https://yt-dl.org/bug
 . Make sure you are using the latest version; type  youtube-dl -U  to update. B
e sure to call youtube-dl with the --verbose flag and include its complete outpu
t.
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpabf7r3
hs\build\youtube_dl\extractor\common.py", line 904, in _parse_json
  File "C:\Python\Python34\lib\json\__init__.py", line 318, in loads
  File "C:\Python\Python34\lib\json\decoder.py", line 343, in decode
  File "C:\Python\Python34\lib\json\decoder.py", line 361, in raw_decode
ValueError: Expecting value: line 1 column 1 (char 0)
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpabf7r3
hs\build\youtube_dl\extractor\common.py", line 904, in _parse_json
  File "C:\Python\Python34\lib\json\__init__.py", line 318, in loads
  File "C:\Python\Python34\lib\json\decoder.py", line 343, in decode
  File "C:\Python\Python34\lib\json\decoder.py", line 361, in raw_decode
ValueError: Expecting value: line 1 column 1 (char 0)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpabf7r3
hs\build\youtube_dl\YoutubeDL.py", line 803, in wrapper
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpabf7r3
hs\build\youtube_dl\YoutubeDL.py", line 824, in __extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpabf7r3
hs\build\youtube_dl\extractor\common.py", line 532, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpabf7r3
hs\build\youtube_dl\extractor\hotstar.py", line 146, in _real_extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpabf7r3
hs\build\youtube_dl\extractor\hotstar.py", line 63, in _call_api_v2
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpabf7r3
hs\build\youtube_dl\extractor\common.py", line 908, in _parse_json
youtube_dl.utils.ExtractorError: 1000256251: Failed to parse JSON  (caused by Va
lueError('Expecting value: line 1 column 1 (char 0)',)); please report this issu
e on https://yt-dl.org/bug . Make sure you are using the latest version; type  y
outube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and
include its complete output.
```


## Description

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I m getting this error in downloading "ERROR: 1000256251: Failed to parse JSON  (caused by ValueError('Expecting value:
 line 1 column 1 (char 0)',));"
 
 can anyone please guide me how to fix it or solve it if this is extractor error