[discoverygo] Add support for playlists

[dlehman83]

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2017.03.10. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.

• [X ] I've verified and I assure that I'm running youtube-dl 2017.03.10

Before submitting an issue make sure you have:

• [X ] At least skimmed through README and most notably FAQ and BUGS sections
• [X ] Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

• [X ] Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your issue

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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add -v flag to your command line you run youtube-dl with, copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

:~/Videos/TVShows$ ./discovery.sh 
[debug] System config: []
[debug] User config: []
[debug] Custom config: [u'--cookies', u'cookiesdiscovery', u'-o', u'%(series)s/S%(season_number)s/s%(season_number)se%(episode_number)s-%(episode)s.%(ext)s']
[debug] Command-line args: [u'--config-location', u'configdiscovery', u'--continue', u'https://www.discoverygo.com/gold-rush/?season.id=57ff9d526b66d18527157ed8', u'-v']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.03.10
[debug] Python version 2.7.12 - Linux-4.8.0-36-generic-x86_64-with-Ubuntu-16.04-xenial
[debug] exe versions: none
[debug] Proxy map: {}
[DiscoveryGo] gold-rush: Downloading webpage
ERROR: Unable to extract video container; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 761, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 427, in extract
    ie_result = self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/discoverygo.py", line 48, in _real_extract
    webpage, 'video container'))
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 759, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)
RegexNotFoundError: Unable to extract video container; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

[debug] System config: []
[debug] User config: []
[debug] Custom config: [u'--cookies', u'cookiesdiscovery', u'-o', u'%(series)s/S%(season_number)s/s%(season_number)se%(episode_number)s-%(episode)s.%(ext)s']
[debug] Command-line args: [u'--config-location', u'configdiscovery', u'--continue', u'https://www.discoverygo.com/gold-rush/', u'-v']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.03.10
[debug] Python version 2.7.12 - Linux-4.8.0-36-generic-x86_64-with-Ubuntu-16.04-xenial
[debug] exe versions: none
[debug] Proxy map: {}
[DiscoveryGo] gold-rush: Downloading webpage
ERROR: Unable to extract video container; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 761, in extract_info
    ie_result = ie.extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 427, in extract
    ie_result = self._real_extract(url)
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/discoverygo.py", line 48, in _real_extract
    webpage, 'video container'))
  File "/usr/local/bin/youtube-dl/youtube_dl/extractor/common.py", line 759, in _search_regex
    raise RegexNotFoundError('Unable to extract %s' % _name)
RegexNotFoundError: Unable to extract video container; please report this issue on https://yt-dl.org/bug . Make sure you are using the latest version; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --verbose flag and include its complete output.

[debug] System config: []
[debug] User config: []
[debug] Custom config: [u'--cookies', u'cookiesdiscovery', u'-o', u'%(series)s/S%(season_number)s/s%(season_number)se%(episode_number)s-%(episode)s.%(ext)s']
[debug] Command-line args: [u'--config-location', u'configdiscovery', u'--continue', u'https://www.discoverygo.com/gold-rush/viking-voyage/', u'-v']
[debug] Encodings: locale UTF-8, fs UTF-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.03.10
[debug] Python version 2.7.12 - Linux-4.8.0-36-generic-x86_64-with-Ubuntu-16.04-xenial
[debug] exe versions: none
[debug] Proxy map: {}
[DiscoveryGo] viking-voyage: Downloading webpage
[DiscoveryGo] viking-voyage: Downloading m3u8 information
[debug] Invoking downloader on u'https://dscusvod-vh.akamaihd.net/i/longform/2017-02/28/154902.020.02.001-52784-,500k,200k,350k,800k,1200k,1600k,2200k,3000k,4500k,.mp4.csmil/index_8_av.m3u8?null=0&hdntl=exp=1489330882~acl=%2f*~data=hdntl~hmac=435b0f2e347a72eb47d9a7fbfe03d6a148dad6f26e24cc3942cb8ec5e8eaea27'
[hlsnative] Downloading m3u8 manifest
[hlsnative] Total fragments: 252
[download] Destination: Gold Rush/S7/s7e21-Episode 21.mp4

[download]   0.0% of ~2.40GiB at 30.20KiB/s ETA --:--:--
[download]   0.0% of ~2.40GiB at 89.52KiB/s ETA --:--:--
[download]   0.0% of ~2.40GiB at 207.11KiB/s ETA --:--:--
[download]   0.0% of ~2.40GiB at 440.22KiB/s ETA 56:11:47
[download]   0.0% of ~2.40GiB at 448.02KiB/s ETA 27:59:00
[download]   0.0% of ~2.40GiB at 413.35KiB/s ETA 14:41:31
[download]   0.0% of ~2.40GiB at 468.46KiB/s ETA 07:56:27
[download]   0.0% of ~2.40GiB at 468.47KiB/s ETA 04:42:11
[download]   0.0% of ~2.40GiB at 456.77KiB/s ETA 03:07:54
[download]   0.0% of ~2.40GiB at 460.46KiB/s ETA 02:22:20
[download]   0.1% of ~2.40GiB at 456.43KiB/s ETA 02:06:19^
[download]   0.1% of ~2.40GiB at 465.29KiB/s ETA 01:56:16^C
[download]   0.1% of ~2.40GiB at 467.55KiB/s ETA 01:50:18^C
ERROR: Interrupted by user


<end of log>

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Description of your issue, suggested solution and other information

Explanation of your issue in arbitrary form goes here. Please make sure the description is worded well enough to be understood. Provide as much context and examples as possible.
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I cannot download a season on DiscoveryGo, but I can download individual episodes.
Here are the 3 urls I've tried.
Gold Rush Season 7 not working
https://www.discoverygo.com/gold-rush/?season.id=57ff9d526b66d18527157ed8
Gold rush not working
https://www.discoverygo.com/gold-rush/
Gold Rush individual episode works
https://www.discoverygo.com/gold-rush/viking-voyage/

Thank you