you can download youtube files if you have some sort of plugin, realplayer has a plugin for IE that you can download from youtube.com, so download realplayer and install, now click tools and preferences and then go to the downloading streaming videos at the bottom and tick the enable download videos button, now press ok, goto youtube.com and look for a video and right click and download to realplayer, now it downloads but it is a .flv file, you need a .flv to avi converter which google.com could help you their, convert it with the tool, now from here we have 1 .avi file, now you need to put it onto disk, you could download cONVERTxtodvd from that pm i sent you, now open convertxtodvd and click convert and locate thee .avi file and it should convert and burn onto disk ready for a dvdplayer.
goodluck
sorry I'm tired, lack of info