Aperture 3 slideshow to iDVD to blank DVD: export commands seem contradictory

Question

This problem is actually related to Aperture v3.3.2 and iDVD v7.1.2 and my previous attempt (11/14/2014) to create a preliminary slideshow (with captions and music track) on Aperture that when completed can be exported to iDVD and then in its final form to a blank DVD.  Now I’m trying to use tutorials.  The problem is when I pull up iDVD webpage, the pop-up tutorial window is unpredictable. The four project buttons (“Create a New Project”, “Open an Existing Project”, “Magic iDVD”, “OneStep DVD”) are okay, opening to the expected start window.  But the long button named “Video Tutorials” is inert and doesn’t do anything except to open to a standard “Apple – Mac: iMac” sales window. Has Apple decommissioned that button because of changed iDVD status?  I think I need those tutorials to finish my iDVD project. Otherwise, I’ll have to use my 2009 “iMovie ’09 & iDVD Portable Genius” manual, which is okay, but I want to at least try the tutorial route before I exhaust all options.
Two members of the Aperture help community have already been kind enough to offer helpful suggestions to my earlier posting on the problem, but iDVD doesn’t seem to be intuitive enough to benefit from work-arounds.  The “Getting Started” PDF off the iDVD Help pull-down seems promising (35 pages), but the “Video Tutorials” is useless.  It opens to a standard “Apple – Mac: OS X Yosemite” sales window.
I understand that Apple hasn’t supported iDVD for quite awhile, but any help will be greatly appreciated. A.Z.

Answer 1

I don't use Aperture so don't know if it can export a slideshow as iPhoto does.  But if it can here's how it's done with iPhoto:
Export the slideshow out of iPhoto as a QT movie file via the Export button in the lower toolbar.   For iPhoto 9.5 and later selct 480p as the size.
Open iDVD, select a theme and drag the exported QT movie file into the open iDVD window being careful to avoid any drop zones.
Follow this workflow to help assure the best quality video DVD:
Once you have the project as you want it save it as a disk image via the File ➙ Save as Disk Image  menu option. This will separate the encoding process from the burn process.
To check the encoding mount the disk image, launch DVD Player and play it.  If it plays OK with DVD Player the encoding is good.
Then burn to disk with Disk Utility or Toast at the slowest speed available (2x-4x) to assure the best burn quality.  Always use top quality media:  Verbatim, Maxell or Taiyo Yuden DVD-R are the most recommended in these forums.