Although watching video on YouTube is very popular, many people would like to download videos from YouTube for collecting or burning to DVD and enjoying on DVD player and TV with large screen. Following is the step-by-step on how to save YouTube video to computer and burn them to DVD.
There're lots of methods to get YouTube video off the web. Now I will present some easy way to download YouTube video to computer.
OS X client:
Mac Free Youtube Downloader - A powerful Youtube Downloader software that can download and convert Youtube Video to AVI WMV MPEG MOV MP4 with high quality on MAC OS X.
Plug-in:
Video Downloader – A plug-in of Firefox that can download videos from YouTube, Google Video, Yahoo Video, Myspace... and many other sites with simply one click.
Web tool:
Zamzar - Zamzar is a free online file conversion web application that can easily convert videos off the Internet to AVI, MPEG, 3GP, MP4, MOV, etc.,Paste the URL into Step 1 and then convert the file to your favorite format.
If you have collected lots of YouTube video and plan to put them to DVD for watching on DVD player with large screen or just for backup, Ok, let's get start to burn a DVD from your downloaded YouTube videos now!
Pre-requirement: A blank DVD disk(DVD +R, DVD-R, DVD+RW or DVD-RW), rewritable DVD-ROM, A YouTube to DVD Converter - DVD Creator. And if you are using a Mac, there is also DVD Creator for Mac provided.
Free Download DVD Creator, install and run it, then click "Import" or File on menu bar to load Youtube files to the software, you need to check the video size on the measure bar on the bottom. Make sure the space doesn't exceed the total DVD capacity.

Click "Menu Template" to customize your DVD menu. There are up to 10 free different styles of built-in templates, frames and buttons for your choice. To apply a template, frame or button, you can just double click it. You can even add text, background music and background image to customize the menu.
Previewing Youtube video files
Just for make sure everything goes as your plan you could have a video preview before burning it to DVD.
Once you have previewed your video and nothing wrong about it, you can go to set TV Standard (PAL/NTSC) on "Setting" option, output Aspect Ratio (4:3/16:9) on "DVD setting bar" and output Video Quality "Low video quality, High video quality and Highest video quality". the highest video quality option is best for high DVD Video quality, even though it will take longer authoring time and occupy more capacity of DVD disc.
And then Click "Burn" and select your DVD drive(if you have multiple DVD drive on PC) and other DVD parameters, after that, hit "Start" to start burning the video files to DVD Disc, DVD Folder or ISO Files.

Tips: The volume of DVD use is shown on the bottom side. You can select DVD type of "D5" or "D9". If the video size is exceed the DVD capability you can reduce it by setting output quality. E.g. select "high quality" instead of "Best performance".
That it, with DVD Creator, you can convert YouTube video clips to DVD and even make your own DVD menu in a few steps, just feel free to watch your Youtube Video on DVD player or TV with large screen!