How do I download a YouTube video?
youtube-dl
Installation from official site:
sudo curl -L https://yt-dl.org/downloads/latest/youtube-dl -o /usr/local/bin/youtube-dl
sudo chmod a+rx /usr/local/bin/youtube-dl
It's also on Ubuntu repos but you will often need to keep it up-to-date with sudo youtube-dl -U
Installation and ugrade from pip
(/):
sudo -H pip install --upgrade youtube-dl
Usage:
youtube-dl YouTube-(or-other-website)-video-link
So it will download the video.
You can also take a look at this for very in-depth documentation on how to use it.
youtube-dl is a great tool for downloading YouTube videos. Install with:
sudo curl -L https://yt-dl.org/downloads/latest/youtube-dl -o /usr/local/bin/youtube-dl
sudo chmod a+rx /usr/local/bin/youtube-dl
Or with pip
(python3-pip):
sudo -H pip install --upgrade youtube-dl
Or from Ubuntu's repo (older version)
sudo apt-get install youtube-dl
then use it this way:
youtube-dl [VIDEO_LINK]
For learning more about advance options, run
man youtube-dl
Or check out the documentation.
Original answer
For Firefox users:
You can install the Video DownloadHelper addon in Firefox and download any embedded object, including YouTube videos.
Minitube
Minitube is a YouTube desktop application. With it you can watch YouTube videos in a new way: you type a keyword, Minitube gives you an endless video stream. Minitube is not about cloning the original YouTube web interface, it aims to create a new TV-like experience.
It does not require Flash Player. From this application you can watch and download videos.