Just thought I’d share this one with you as I’ve just managed to sort out a very similar issue with the help of one of the users on this site (Dogg).
I was creating the video_ts data with dvdSanta and then burning with videoDVDmaker. Anyway, it turns out that both software hadn’t been installed properly (my fault) so I uninstalled both and added imgburner.
Ran the programme and hey presto, my burnt DVD’s are now being recognised and are playing in both my standalone Phillips DVD players.
I use TDK DVD+R media.
Hope it helps.