I can vouch for the free Downloadhelper, add on for Firefox. That's what I use on my Mac. You should get the option to DL either .flv or .mp4 video. I try to stay away from .flv video if I plan on editing. I download .mp4 instead. It's easier to work with.
I use VLC media player to watch either .flv or mp4. You can pause, rewind, play again, etc. It's great for the video guitar lessons on you tube. If you email the author and get their permission, then I would think that it's legal, since you got written permission. But I'm no lawyer.
hello can u advice me ah nice DVD burner that can burn 6 movie in one DVD 4.7 thanks God Bless
Don't know about the best DVD burner. But, I think
You need a program burn multiple video files to DVD.
DVD Flick should do the job.http://www.dvdflick.net/
Hope this helps.