How Do I Burn a DVD from iMovie?

Burning iMovie edited movies to DVD is an anxiety for many Mac users:
What should be the best export format?
How to burn a DVD of my movie without taking a theme from iDVD?
If I export to iDVD then it wants to theme it all over again. Just want to make a DVD from iMovie project?

Or you will have the headache as following:
"Please help, I've been trying to burn a 45-min HD video from my Sony FX1 to DVD. I imported the HD video to my iMovie and the edit looks great. I exported so many times using all different formats QuickTime, Mpeg4 etc and share to iDVD, I can't seem to get the DVD to work without skipping on my DVD player. It's driving me nutz, then I purchased Toast Platinum Pro but the burned DVD still skips. What settings do I need to use to export and burn successfully on Toast? The file I want to use is only 3.3GB on DVD to play on standard DVD player. PS I'm new to this HD video thing and iMovie. Please any help would be greatly appreciated."
From discussions.apple.com

If you can't find a good solution for above questions after a tough Google search, if you are disappointed with the low quality made by iDVD, if the DVD didn't play well on your TV or DVD player, never mind, this guide will make things easier and directly, so that you can easily burn iMovie movies to DVD disc directly for smoothly playback on normal DVD player and on TV in 4:3/16:9 ratio. Let's simply export and burn iMovie project to DVD disc using a professional DVD Maker for Mac.

Firstly, export movie from iMovie:

1 Choose File > Share > Export using QuickTime formats.

2. Choose "Movie to QuickTime Movie" from the Export drop down menu, if necessary. Choose an appropriate format from the Formats menu. The chart below may help you make decides among the various formats. Choosing Full Quality HD DV is recommended to make sure the exporting video quality.

3 Type a name for your movie file and select a destination to save files.

4 Click "Save" to export iMovie project to video file.

Secondly, burn a DVD from iMovie in a few clicks:

After exporting iMovie project to movie format file, then the left is directly import the iMovie exported movie to DVD Maker Mac for burning to DVD disc, and this is much easier than the above part. Just follow these 3 steps to create DVD from iMovie:

Step 1: Import your iMovie exported movies to this Mac DVD burning program by clicking "Add File".

Step 2: Choose DVD-5 (4.7G) or DVD-9 (8.5G) as the output according to your DVD disc specs.

Step 3: Begin to burn iMovie porject to DVD.
Press the "BURN" button to set DVD burning settings and burn iMovie to DVD or ISO files.
If you choose DVD, please insert a bland new DVD disc to Mac, and click "Apply" button to start creating your DVD. Now, you can just wait until the burning program finishes, and then enjoy your DVD on the go.
If you select ISO option, the imported video files will be burn to ISO file and save in your Hard Drive on Mac.
DVD Aspect Ratio: Select an aspect ratio for the output DVD movie: 16:9 for widescreen DVD player, and 4:3 for the standard TV.