Gyao extractor fails on certain URLs

[julroy67]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2019.04.30
• I've checked that all provided URLs are alive and playable in a browser
• I've checked that all URLs and arguments with special characters are properly quoted or escaped
• I've searched the bugtracker for similar issues including closed ones

Verbose log

./youtube-dl -v https://gyao.yahoo.co.jp/title/%E3%81%97%E3%82%83%E3%81%B9%E3%81%8F%E3%82%8A007/5b025a49-b2e5-4dc7-945c-09c6634afacf 
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://gyao.yahoo.co.jp/title/%E3%81%97%E3%82%83%E3%81%B9%E3%81%8F%E3%82%8A007/5b025a49-b2e5-4dc7-945c-09c6634afacf']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2019.04.30
[debug] Python version 3.7.3 (CPython) - Linux-5.0.13-arch1-1-ARCH-x86_64-with-arch
[debug] exe versions: ffmpeg 4.1.3, ffprobe 4.1.3, rtmpdump 2.4
[debug] Proxy map: {}
[generic] 5b025a49-b2e5-4dc7-945c-09c6634afacf: Requesting header
WARNING: Falling back on generic information extractor.
[generic] 5b025a49-b2e5-4dc7-945c-09c6634afacf: Downloading webpage
[generic] 5b025a49-b2e5-4dc7-945c-09c6634afacf: Extracting information
ERROR: Unsupported URL: https://gyao.yahoo.co.jp/title/%E3%81%97%E3%82%83%E3%81%B9%E3%81%8F%E3%82%8A007/5b025a49-b2e5-4dc7-945c-09c6634afacf
Traceback (most recent call last):
  File "./youtube-dl/youtube_dl/YoutubeDL.py", line 796, in extract_info
    ie_result = ie.extract(url)
  File "./youtube-dl/youtube_dl/extractor/common.py", line 529, in extract
    ie_result = self._real_extract(url)
  File "./youtube-dl/youtube_dl/extractor/generic.py", line 3320, in _real_extract
    raise UnsupportedError(url)
youtube_dl.utils.UnsupportedError: Unsupported URL: https://gyao.yahoo.co.jp/title/%E3%81%97%E3%82%83%E3%81%B9%E3%81%8F%E3%82%8A007/5b025a49-b2e5-4dc7-945c-09c6634afacf

Description

The Yahoo Gyao extractor seems to not work on this particular URL (https://gyao.yahoo.co.jp/title/%E3%81%97%E3%82%83%E3%81%B9%E3%81%8F%E3%82%8A007/5b025a49-b2e5-4dc7-945c-09c6634afacf) but works on others like this one (https://gyao.yahoo.co.jp/p/11183/v00019/). The regex may need some tweaking to match this type of URL.