This belongs in the "Requests, How-To's and Technical Discussions" forum, not Off-Topic.

That said, if it's in HD, you can never burn it to a DVD-Video (playable on standard DVD players) and keep it in HD. You'd need to convert it to standard def.

If you have a Blu-Ray player, you can make an AVCHD disc (aka a "BD-5" or "BD-9"), which is basically just a Blu-Ray formatted disc burned to a regular DVD disc.

Do you use Windows or Mac OS X? If you use Windows, other members might be better suited to answer your question, but I can probably help out if you use a Mac.