I'm reading things about 'bookmarked' DVDs. What is it? How can I do it? What are the advantages of bookmarking over not? Thank you.
I am assuming you mean booktyping/bitsetting. Which is when using a +R DVD media your drive will booktype/bitset it to DVD-Rom for better playback on standalone players. Many older DVD players will not play +R media and must be fooled into thinking that the disk is -R media. Booktyping/bitsetting will do this, but only if your drive supports the feature. Here is an article that explains http://www.k-probe.com/bitsetting-booktype-faq.php
Book typing will solve your problems and or issues with older stand alone DVD players when using DVD+R, DVD+RW and DVD+R DL disc. Yes, I'm a DVD+R person and "book typing" them into DVD-ROM. So far, all of my stand alone DVD players never had any playback issues. All worked flawlessly.
I agree, have an old Toshiba that plays nothing but -R and all my booktyped +R's play and play well much better than the -R's.