Convert Youtube videos on the fly

Use VLC to convert and save the audio (for example) from youtube.

Open VLC

Use CTRL + R to open Media Tab and move over to Network Tab

Paste in URL of the file from the browser bar

Go to the bottom of the tab and press the upside down triangle next to the "Convert/save" button

This opens the options screen where you can change the quality  and other options.

Change output to mp3 or flac (whatever your choice), change anything else you want to

Name your output file and path

Press convert/save button


Alternative that may work to download Videos directly.

Put an 'ss' if front of 'youtube' in the url