[solved] requested format not available, could not send HEAD request - yip yip

[Gubith]

Checklist

• I'm reporting a broken site support issue
• [ x] I've verified that I'm running youtube-dl version 2019.11.22
• [ x] I've checked that all provided URLs are alive and playable in a browser
• [ x] I've checked that all URLs and arguments with special characters are properly quoted or escaped
• [ x] I've searched the bugtracker for similar bug reports including closed ones
• I've read bugs section in FAQ

Verbose log

[debug] Command-line args: ['https://www.youtube.com/watch?v=KTc3PsW5ghQ', '--buffer-size', '16k', '-v', '-wco', '%(title)s__%(id)s__%(resolution)s_%(upload_date)s.%(ext)s', '-ffmpeg-location', 'R:\\tools\\ffmpeg\\bin\\ffmpeg.exe', '--prefer-ffmpeg', '--restrict-filenames', '--write-description', '--ignore-errors', '--write-annotation']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2019.11.22
[debug] Python version 3.4.4 (CPython) - Windows-10-10.0.17134
[debug] exe versions: none
[debug] Proxy map: {}
[youtube] KTc3PsW5ghQ: Downloading webpage
[youtube] KTc3PsW5ghQ: Downloading video info webpage
[youtube] KTc3PsW5ghQ: Downloading annotations
ERROR: requested format not available

youtube_dl.utils.ExtractorError: requested format not available

[generic] R:\tools\ffmpeg\bin\ffmpeg: Requesting header
WARNING: Could not send HEAD request to R:\tools\ffmpeg\bin\ffmpeg.exe: <urlopen error unknown url type: r>
[generic] R:\tools\ffmpeg\bin\ffmpeg: Downloading webpage
ERROR: Unable to download webpage: <urlopen error unknown url type: r> (caused by URLError('unknown url type: r',))

Description

Error caused by missing - in the switch
I was reading through issues and preparing to post something when I found the solution.
The error looked like something with the a/v formats, but was just a typo. My fault.

Corrected here:
youtube-dl.exe "https://www.youtube.com/watch?v=KTc3PsW5ghQ" --buffer-size 16k -v -wco %(title)s__%(id)s__%(resolution)s_%(upload_date)s.%(ext)s -ffmpeg-location R:\tools\ffmpeg\bin\ffmpeg.exe --prefer-ffmpeg --restrict-filenames --write-description --ignore-errors --write-annotation

BTW
--restrict-filenames also replaces spaces with underscore
The link is Sesame Street: The Martians Discover a Telephone