I use User agent: Mozilla/5.0 (X11; Linux i686; rv:51.0) Gecko/20100101 Firefox/51.0 SeaMonkey/2.48 on a Debian Stretch machine with the MATE desktop.
I've never used youtube before.
I received a link to a youtube video <https://www.youtube.com/watch?v=82_bPWyrPFc > which played fine.
I did not have time to watch the whole video.
How can I download and save it?
Is there some way to pause a video if I'm interrupted?