Remember there is NO WAY TO DO THIS for a "Video DVD" since that is 480i or 480p and never more.
This means you have to reveal if you are OK with HD DVD creations that only play on Blu-Ray, PS3, PCs and 360 Xbox's.
The method has been discussed many times but let's hear what restrictions you are working with.
Newbie here. I recently bought a Canon Vixia HFR20 HD camera. I was editing my video on imovie and when I was trying to export to DVD, imovie thumbed down the resolution quality. What programs are available where I can edit and then burn the HD video at full quality onto DVD?