If you use Firefox, there is an addon called Bytubed, I use it myself and have had good results.
https://addons.mozilla.org/en-US/firefox/addon/bytubed/
Once you get the hang of it, saving youtube video is easy. If your system won’t play some of the formats youtube uses for their videos, there’s a freeware video player which I also use called videoLAN that can handle most every video format without needing them converted.
Wow. Xlent add-on. And the video quality of the mp4’s it makes is much, much better than watching things on Utube.
I should be able to capture all ten and they will easily fit on one DVD.
Good to have them so I can get to them if I’m offline...