You can configure youtube-dl by placing default arguments (such as ``--extract-audio --no-mtime`` to always extract the audio and not copy the mtime) into :file:`/etc/youtube-dl.conf` and/or :file:`~/.config/youtube-dl/config`. On Windows, the configuration file locations are :file:`%APPDATA%\\youtube-dl\\config.txt` and :file:`C:\Users\\<Yourname>\\youtube-dl.conf`.
OUTPUT TEMPLATE
===============
The ``-o`` option allows users to indicate a template for the output file names. The basic usage is not to set any template arguments when downloading a single file, like in ``youtube-dl -o funny_video.flv "http://some/video"``. However, it may contain special sequences that will be replaced when downloading each video. The special sequences have the format ``%(NAME)s``. To clarify, that is a percent symbol followed by a name in parenthesis, followed by a lowercase S. Allowed names are:
-``id``: The sequence will be replaced by the video identifier.
-``url``: The sequence will be replaced by the video URL.
-``uploader``: The sequence will be replaced by the nickname of the person who uploaded the video.
-``upload_date``: The sequence will be replaced by the upload date in YYYYMMDD format.
-``title``: The sequence will be replaced by the video title.
-``ext``: The sequence will be replaced by the appropriate extension (like flv or mp4).
-``epoch``: The sequence will be replaced by the Unix epoch when creating the file.
-``autonumber``: The sequence will be replaced by a five-digit number that will be increased with each download, starting at zero.
-``playlist``: The name or the id of the playlist that contains the video.
-``playlist_index``: The index of the video in the playlist, a five-digit number.
The current default template is ``%(title)s-%(id)s.%(ext)s``.
In some cases, you don't want special characters such as 中, spaces, or &, such as when transferring the downloaded filename to a Windows system or the filename through an 8bit-unsafe channel. In these cases, add the ``--restrict-filenames`` flag to get a shorter title::
Bugs and suggestions should be reported at: https://github.com/rg3/youtube-dl/issues. Please read the `bug reporting guidelines <https://github.com/rg3/youtube-dl/#bugs>`_ before opening a ticket.