How to Back Up Blu-ray Collection with Leawo Blu-ray Copy?
http://www.leawo.org/tutorial/how-to-back-up-blu-ray-collection-with-leawo-blu-ray-copy.html

Depending on where you live, DVD formats differ from each country. Generally speaking, a DVD disc released in a country which adopts NTSC television system couldn’t be recognized and played back by DVD player where the country adopts PAL television system. Unless the DVD disc is region free, most DVD players could only play back DVD discs released with the same television system. Here is a post that would introduce detailed information about NTSC and PAL, ways to play back NTSC and PAL DVD discs, and solutions to convert NTSC to PAL DVD and create PAL DVD disc out of videos：

http://www.leawo.org/tutorial/ntsc-to-pal-convert-ntsc-dvd-to-pal-dvd.html