Repository: youtube-dl
Issue: [vbox] Add support for authentication
Labels: nsfw

## Please follow the guide below

- 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

---

### 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](https://github.com/rg3/youtube-dl/blob/master/README.md#how-do-i-update-youtube-dl) and update. Issues with outdated version will be rejected.
- [x] I've **verified** and **I assure** that I'm running youtube-dl **2017.03.16**

### Before submitting an *issue* make sure you have:
- [x] At least skimmed through [README](https://github.com/rg3/youtube-dl/blob/master/README.md) and **most notably** [FAQ](https://github.com/rg3/youtube-dl#faq) and [BUGS](https://github.com/rg3/youtube-dl#bugs) sections
- [x] [Searched](https://github.com/rg3/youtube-dl/search?type=Issues) 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

---

### The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your *issue*

---

### 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.
...

```

---

### 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


---

### Description of your *issue*, suggested solution and other information

Cannot download from www.vbox7.com this url https://www.vbox7.com/play:bcb87e7c29