This is my youtube-dl Docker image. It rolls up all of the dependencies that youtube-dl has (Python, ffmpeg, etc.) into a nice, portable thing.
To run it:
docker run --rm -it filefrog/ytdl [options]
In almost all circumstances, you will want to mount in an external
file system at /media, to save your downloaded video files:
docker run --rm -it \
-v $PWD/youtube:/media \
filefrog/ytdl [options]
For example, to download the T-T-T-T-Target Vine to your home directory:
docker run --rm -it -v $HOME:/media \
filefrog/ytdl https://www.youtube.com/watch?v=luLX6gCbPyw
This docker image is built such that any commands you pass it are
interpreted as arguments to the base youtube-dl command. In
that sense, docker run ... filefrog/ytdl can be thought of as an
alias for the actual youtube-dl command, except you don't have
to install the software, or Python, or ffmpeg.