Hello,
For downloading youtube videos/audios you can use a tool youtube-dl. Just download it using and install it:
Quote:
#sudo apt-get install youtube-dl
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Then to download YouTube videos on Linux, use
youtube-dl in the terminal like this:
Quote:
#youtube-dl [options] video_url
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To see available options type
man youtube-dl in a terminal.
And to burn CD/DVD you can use K3b tool, simple.