Site Support for KOAT 7 (ABC local affiliate)

[a-raccoon]

Please add site support for koat.com videos:

https://www.koat.com/article/caught-on-camera-teens-breaking-into-vehicles/4476758

• I've verified and I assure that I'm running youtube-dl 2019.03.18
• Site support request (request for adding support for a new site)

If the purpose of this issue is a site support request provide the full verbose output:

[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://www.koat.com/article/caught-on-camera-teens-breaking-into-vehicles/4476758']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2019.03.18
[debug] Python version 3.4.4 (CPython) - Windows-7-6.1.7601-SP1
[debug] exe versions: ffmpeg N-92953-gad0d5d7516, ffprobe N-92953-gad0d5d7516
[debug] Proxy map: {}
[generic] 4476758: Requesting header
WARNING: Falling back on generic information extractor.
[generic] 4476758: Downloading webpage
[generic] 4476758: Extracting information
ERROR: Unsupported URL: https://www.koat.com/article/caught-on-camera-teens-breaking-into-vehicles/4476758
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpcs52imf5\build\youtube_dl\YoutubeDL.py", line 794, in extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpcs52imf5\build\youtube_dl\extractor\common.py", line 529, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpcs52imf5\build\youtube_dl\extractor\generic.py", line 3320, in _real_extract
youtube_dl.utils.UnsupportedError: Unsupported URL: https://www.koat.com/article/caught-on-camera-teens-breaking-into-vehicles/4476758
...
<end of log>