Don't forget that even if you do everything right but you are using poor quality blank DVDs, you may get a lot of failures. TaiyoYuden JVC seem to have less failures while store brands and Memorex seem to have more.
Although you have a high definition camcorder, you did not say if you want to make standard DVDs or High Definition disc. By making a standard DVD, you will lose much of the quality that you have from the camcorder.. You may not like the results and the bars around the video while played.
If you just want to make a standard DVD, just work with mpg2 format.
An AVCHD disc will not hold much more than 40 minutes on a single layer disc.
For a blu ray disc, either AVCHD or mpg2 will work.
Tell us step by step how you made the DVD that would not work (make sure you use the program item information - Video Wave. MyDVD, Copy and Convert etc.
I would guess that almost all new DVD players being sold have the blu ray capability to keep the original quality. You may have to buy from Roxio the ability to work with blu ray