Gyao (Yahoo) extractor broken for certain URLs

[julroy67]

Checklist

• I'm reporting a broken site support
• I've verified that I'm running youtube-dl version 2020.02.16
• 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/5b025a49-b2e5-4dc7-945c-09c6634afacf
[debug] System config: ['--prefer-free-formats']
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://gyao.yahoo.co.jp/title/5b025a49-b2e5-4dc7-945c-09c6634afacf']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2020.02.16
[debug] Python version 3.7.6 (CPython) - Linux-5.5.5-200.fc31.x86_64-x86_64-with-fedora-31-Thirty_One
[debug] exe versions: ffmpeg 4.2.2, ffprobe 4.2.2
[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/5b025a49-b2e5-4dc7-945c-09c6634afacf
Traceback (most recent call last):
  File "/usr/lib/python3.7/site-packages/youtube_dl/YoutubeDL.py", line 795, in extract_info
    ie_result = ie.extract(url)
  File "/usr/lib/python3.7/site-packages/youtube_dl/extractor/common.py", line 530, in extract
    ie_result = self._real_extract(url)
  File "/usr/lib/python3.7/site-packages/youtube_dl/extractor/generic.py", line 3350, in _real_extract
    raise UnsupportedError(url)
youtube_dl.utils.UnsupportedError: Unsupported URL: https://gyao.yahoo.co.jp/title/5b025a49-b2e5-4dc7-945c-09c6634afacf

Description

The Yahoo Gyao extractor seems to not work on this particular URL (https://gyao.yahoo.co.jp/title/5b025a49-b2e5-4dc7-945c-09c6634afacf) but works on others like this one (https://gyao.yahoo.co.jp/title/%E3%83%A9%E3%83%B3%E3%83%81%E5%90%88%E3%82%B3%E3%83%B3%E6%8E%A2%E5%81%B5%EF%BD%9E%E6%81%8B%E3%81%A8%E3%82%B0%E3%83%AB%E3%83%A1%E3%81%A8%E8%AC%8E%E8%A7%A3%E3%81%8D%E3%81%A8%EF%BD%9E/5dfc2bed-94fb-4004-a075-77f6f2e4ee10).