Repository: youtube-dl
Issue: Add support for Iltalehti
Labels: site-support-request

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## Checklist

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Carefully read and work through this check list in order to prevent the most common mistakes and misuse of youtube-dl:
- First of, make sure you are using the latest version of youtube-dl. Run `youtube-dl --version` and ensure your version is 2020.06.16.1. If it's not, see https://yt-dl.org/update on how to update. Issues with outdated version will be REJECTED.
- Make sure that all provided video/audio/playlist URLs (if any) are alive and playable in a browser.
- Make sure that site you are requesting is not dedicated to copyright infringement, see https://yt-dl.org/copyright-infringement. youtube-dl does not support such sites. In order for site support request to be accepted all provided example URLs should not violate any copyrights.
- Search the bugtracker for similar site support requests: http://yt-dl.org/search-issues. DO NOT post duplicates.
- Finally, put x into all relevant boxes (like this [x])
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- [x] I'm reporting a new site support request
- [x] I've verified that I'm running youtube-dl version **2020.06.16.1**
- [x] I've checked that all provided URLs are alive and playable in a browser
- [x] I've checked that none of provided URLs violate any copyrights
- [x] I've searched the bugtracker for similar site support requests including closed ones


## Example URLs

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Provide all kinds of example URLs support for which should be included. Replace following example URLs by yours.
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- Single video: https://www.youtube.com/watch?v=BaW_jenozKc
- Single video: https://youtu.be/BaW_jenozKc
- Playlist: https://www.youtube.com/playlist?list=PL4lCao7KL_QFVb7Iudeipvc2BCavECqzc


## Description

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https://en.wikipedia.org/wiki/Iltalehti

youtube-dl --verbose https://www.iltalehti.fi/kotimaa/a/22a7cc8e-7458-49e2-ba5a-1bc5ed651240
[debug] System config: []
[debug] User config: []
[debug] Custom config: []
[debug] Command-line args: ['--verbose', 'https://www.iltalehti.fi/kotimaa/a/22a7cc8e-7458-49e2-ba5a-1bc5ed651240']
[debug] Encodings: locale cp1252, fs mbcs, out cp850, pref cp1252
[debug] youtube-dl version 2020.06.16.1
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.18362
[debug] exe versions: ffmpeg 4.2.3, ffprobe 4.2.3
[debug] Proxy map: {}
[generic] 22a7cc8e-7458-49e2-ba5a-1bc5ed651240: Requesting header
WARNING: Falling back on generic information extractor.
[generic] 22a7cc8e-7458-49e2-ba5a-1bc5ed651240: Downloading webpage
[generic] 22a7cc8e-7458-49e2-ba5a-1bc5ed651240: Extracting information
ERROR: Unsupported URL: https://www.iltalehti.fi/kotimaa/a/22a7cc8e-7458-49e2-ba5a-1bc5ed651240
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpspbsbtmq\build\youtube_dl\YoutubeDL.py", line 797, in extract_info
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpspbsbtmq\build\youtube_dl\extractor\common.py", line 530, in extract
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\ytdl-org\tmpspbsbtmq\build\youtube_dl\extractor\generic.py", line 3382, in _real_extract
youtube_dl.utils.UnsupportedError: Unsupported URL: https://www.iltalehti.fi/kotimaa/a/22a7cc8e-7458-49e2-ba5a-1bc5ed651240