Ubuntu 16.04: Verify latest youtube-dl version:

$ sudo apt-get install youtube-dl youtube-dl is already the newest version (2016.02.22-1). 0 upgraded, 0 newly installed, 0 to remove and 137 not upgraded. 

Why does video's URL fail?

$ youtube-dl -F [youtube] ZFzSCJHp0lo: Downloading webpage [youtube] ZFzSCJHp0lo: Downloading video info webpage WARNING: Unable to extract video title ERROR: This video is unavailable. 

Python Version

$ readlink -f $(which python) | xargs -I % sh -c 'echo -n "%: "; % -V' /usr/bin/python2.7: Python 2.7.12 
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1 Answer

See youtube-dl: Download Page.

To install it right away for all UNIX users (Linux, OS X, etc.), type:

sudo curl -L -o /usr/local/bin/youtube-dl sudo chmod a+rx /usr/local/bin/youtube-dl 

If you do not have curl, you can alternatively use a recent wget:

sudo wget -O /usr/local/bin/youtube-dl sudo chmod a+rx /usr/local/bin/youtube-dl 

You can also use pip:

sudo pip install --upgrade youtube_dl 

The above steps will install latest version of youtube-dl that can be checked using youtube-dl --version. As of now the output of youtube-dl --version is:

2020.01.01 
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