[vbox] Add support for authentication

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• You will be asked some questions and requested to provide some information, please read them carefully and answer honestly
• Put an x into all the boxes [ ] relevant to your issue (like that [x])
• Use Preview tab to see how your issue will actually look like

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2017.03.16. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.

• I've verified and I assure that I'm running youtube-dl 2017.03.16

Before submitting an issue make sure you have:

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

What is the purpose of your issue?

• 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 ```):

$ youtube-dl -v https://www.vbox7.com/play:bcb87e7c29
C:\Users\Admin\Desktop>C:\Users\Admin\Desktop\youtube-dl.exe https://www.vbox7.c
om/play:bcb87e7c29
[Vbox7] bcb87e7c29: Downloading JSON metadata
ERROR: An extractor error has occurred. (caused by KeyError('title',)); please r
eport this issue on https://yt-dl.org/bug . Make sure you are using the latest v
ersion; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --ve
rbose flag and include its complete output.

C:\Users\Admin\Desktop>C:\Users\Admin\Desktop\youtube-dl.exe -v https://www.vbox
7.com/play:bcb87e7c29 >> out.txt
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://www.vbox7.com/play:bcb87e7c29']
[debug] Encodings: locale cp1251, fs mbcs, out cp1251, pref cp1251
[debug] youtube-dl version 2017.03.16
[debug] Python version 3.4.4 - Windows-7-6.1.7601-SP1
[debug] exe versions: ffmpeg 1.2
[debug] Proxy map: {}
ERROR: An extractor error has occurred. (caused by KeyError('title',)); please r
eport this issue on https://yt-dl.org/bug . Make sure you are using the latest v
ersion; type  youtube-dl -U  to update. Be sure to call youtube-dl with the --ve
rbose flag and include its complete output.
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpvd2cwzkd\bu
ild\youtube_dl\extractor\common.py", line 427, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpvd2cwzkd\bu
ild\youtube_dl\extractor\vbox7.py", line 78, in _real_extract
KeyError: 'title'
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpvd2cwzkd\bu
ild\youtube_dl\extractor\common.py", line 427, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpvd2cwzkd\bu
ild\youtube_dl\extractor\vbox7.py", line 78, in _real_extract
KeyError: 'title'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpvd2cwzkd\bu
ild\youtube_dl\YoutubeDL.py", line 761, in extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmpvd2cwzkd\bu
ild\youtube_dl\extractor\common.py", line 440, in extract
youtube_dl.utils.ExtractorError: An extractor error has occurred. (caused by Key
Error('title',)); 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 cal
l youtube-dl with the --verbose flag and include its complete output.
...

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If the purpose of this issue is a site support request please provide all kinds of example URLs support for which should be included (replace following example URLs by yours):

• Single video: https://www.vbox7.com/play:bcb87e7c29

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Description of your issue, suggested solution and other information

Cannot download from www.vbox7.com this url https://www.vbox7.com/play:bcb87e7c29