ive downloaded a video of the history of the Nurburgring which id like to put on to a DVD to watch on the tv but it wont let me burn to my philips dvd-r discs. now i know that some dvd's dont work with certain dvd burners but im half way through a spindle of these dvds and have never had a problem. they wont burn on any program, nero, windows built in burner or ultraiso. ive also tried to burn other media on itunes to no avail. i found some other kodak dvds which did work but cant work out why dvd's would just stop working? anyone know of these things? 