How to download youtube videos onto my mac easily, and for free?

My order receipt says it is a lifetime code, why will it not work?

I have got a lot of videos on my computer, in mov, mp4 and avi formats. Can I use a single video or DVD burner to burn all those files onto my blank dvd disks? I tried nero burner, not good. So I hope I could get an answer here and can you tell me how? I prefer an easy way to do this. Thank you very much!!!

What is the difference between HD DVD Player and Blu Ray DVD player? I have a Toshiba HDTV 1080 P DVD player, but am considering a Blu-ray DVD player. Will the Blu-ray player play my regular DVDs better than my DVD player now?

how can i download a youtube video?

Typed in Activation Code, but nothing happens.

Need to know how to convert SWF to MP4 for watching on iPhone.

Is there an app to record iPad screen?

How much video can a 30gb ipod video hold? What's the minimum and maximum?

I am creating my first youtube video and need an easy-to-use & free editing program. What video editting freeware have you tried and would like to recommend? Thanks a lot!