Vimeo review IE broken config url

[davekaro]

• I've verified and I assure that I'm running youtube-dl 2017.01.24
• 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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$ python -m youtube_dl -v
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: [u'-v']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.01.24
[debug] Git HEAD: c3a65c3
[debug] Python version 2.7.12 - Darwin-16.3.0-x86_64-i386-64bit
[debug] exe versions: ffmpeg 3.1.3, ffprobe 3.1.3
[debug] Proxy map: {}
Usage: __main__.py [OPTIONS] URL [URL...]

__main__.py: error: You must provide at least one URL.
Type youtube-dl --help to see a list of all options.

---

Back in #10900 I discovered that Vimeo had started using React for the video review sites. They still are, but appear to now render more HTML on the server than they were initially. a093cfc fixed the issue by grabbing the configUrl out of the JSON in the source. However, now that attribute is gone from the source, but the original solution of grabbing it from the data-config-url in the HTML works again - because Vimeo sends that HTML from the server. So, simply reverting those few lines fixes the broken importer. However, maybe it's better to just add

if config_url is None:
    config_url = self._html_search_regex(
    r'data-config-url="([^"]+)"', webpage, 'config URL',
    default=NO_DEFAULT if video_password_verified else None)

in case Vimeo changes again?