youtube-dl

The youtube-dl application is a command-line utility to download YouTube videos.  Some other sites are supported as well.  This app requires Python, so it must be installed using instructions such as the link below:

https://www.python.org/downloads/release/python-390/

If Python 3 is used, an error may be returned due to python not being found.  Use the following commands:

whereis python3

sudo ln -s /usr/bin/python3 /usr/bin/python

To install youtube-dl, use the commands below:

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

To use the application, use the command with an URL:

/usr/local/bin/youtube-dl -k <URL of video>

The -k switch will download the file in multiple formats, including .MP4.  If you only wish to use .MP4, use the switch -f mp4 before the URL.

https://github.com/ytdl-org/youtube-dl