I am not going to post this all over this forum. USERS PLEASE SPEAK UP HERE IF YOU WANT A MEDIA FORUM, I DO.
If you have one of these devices, download the new Desktop Manager 4.2 SP 2 with Roxio.
Install it and get familiar with it. It's a 231mb DL so be patient.
Now to convert any You Tube video or other video to .mp4, avi, mov or wma, use this free program. SUPER © .
The settings for this can be found by left clicking in the program area. Select your output folder. Configure your Roxio to watch that folder.
After you encode to that folder you can select Copy Down in Roxio and it will convert that file on the fly and put it on your SD card.
I just did it with this interesting YT video. YouTube - Charging Boar