[issue re-appeared] Windows %HOMEPATH% error, shows unsupported format character 'H'

[iripu]

Make sure you are using the latest version:

• I've verified and I assure that I'm running youtube-dl 2017.05.01

Before submitting an issue make sure you have:

• At least skimmed through README and most notably FAQ and BUGS sections
• Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

• Bug report (encountered problems with youtube-dl)
• Site support request (request for adding support for a new site)
• Feature request (request for a new functionality)
• Question
• Other

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The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your issue

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F:\>youtube-dl -v https://www.youtube.com/watch?v=ZVQfR27ISjM
[debug] System config: []
[debug] User config: ['--no-mtime', '--console-title', '-o', 'C:\\%HOMEPATH%\\Desktop\\%(title)s-%(height)sp.%(ext)s']
[debug] Custom config: []
[debug] Command-line args: ['-v', 'https://www.youtube.com/watch?v=ZVQfR27ISjM']
[debug] Encodings: locale cp1252, fs mbcs, out cp437, pref cp1252
[debug] youtube-dl version 2017.05.01
[debug] Python version 3.4.4 - Windows-8.1-6.3.9600
[debug] exe versions: ffmpeg N-84348-gdb7a05d, ffprobe N-84348-gdb7a05d
[debug] Proxy map: {}
[youtube] ZVQfR27ISjM: Downloading webpage
[youtube] ZVQfR27ISjM: Downloading video info webpage
[youtube] ZVQfR27ISjM: Extracting video information
[youtube] {22} signature length 40.40, html5 player vflppxuSE
[youtube] {43} signature length 40.40, html5 player vflppxuSE
[youtube] {18} signature length 40.40, html5 player vflppxuSE
[youtube] {36} signature length 40.40, html5 player vflppxuSE
[youtube] {17} signature length 40.40, html5 player vflppxuSE
[youtube] {137} signature length 40.40, html5 player vflppxuSE
[youtube] {248} signature length 40.40, html5 player vflppxuSE
[youtube] {136} signature length 40.40, html5 player vflppxuSE
[youtube] {247} signature length 40.40, html5 player vflppxuSE
[youtube] {135} signature length 40.40, html5 player vflppxuSE
[youtube] {244} signature length 40.40, html5 player vflppxuSE
[youtube] {134} signature length 40.40, html5 player vflppxuSE
[youtube] {243} signature length 40.40, html5 player vflppxuSE
[youtube] {133} signature length 40.40, html5 player vflppxuSE
[youtube] {242} signature length 40.40, html5 player vflppxuSE
[youtube] {160} signature length 40.40, html5 player vflppxuSE
[youtube] {278} signature length 40.40, html5 player vflppxuSE
[youtube] {140} signature length 40.40, html5 player vflppxuSE
[youtube] {171} signature length 40.40, html5 player vflppxuSE
[youtube] {249} signature length 40.40, html5 player vflppxuSE
[youtube] {250} signature length 40.40, html5 player vflppxuSE
[youtube] {251} signature length 40.40, html5 player vflppxuSE
ERROR: Error in output template: unsupported format character 'H' (0x48) at index 4 (encoding: 'cp1252')
Traceback (most recent call last):
  File "C:\Users\dst\AppData\Roaming\Build archive\youtube-dl\rg3\tmp0io2aq9r\build\youtube_dl\YoutubeDL.py", line 675,
in prepare_filename
ValueError: unsupported format character 'H' (0x48) at index 4

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Description of your issue, suggested solution and other information

I tried to download this video: https://www.youtube.com/watch?v=ZVQfR27ISjM.

Shows error unsupported format character 'H' (0x48) at index 4

My config has this line:

-o "C:\%HOMEPATH%\Desktop\%(title)s-%(height)sp.%(ext)s"

If I comment that line it works. My homepath is: C:\Users\ripu
Same bug was reported by me and it was fixed, now re-appeared.

[dstftw]

This won't fix. Use $ for env variables in configuration file.

[iripu]

Great. Example on Readme.md still has C:\%HOMEPATH% and two %%, you should update that.