sorry bro, i didn't see the screenshots as i block them
anyway, from what i see you CAN'T burn them to dvd using nero. you simply don't have the dvd video files as explained in the error message of your first post.
anyway, the best bet is to use convertxtodvd and drag in either the .mov, .mp4, or .mpg as shown in
http://i15.photobucket.com/albums/a353/jeff_geck/420-1.jpg and have it convert to a dvd. i'm assuming those files are of the same vid as they have the same name but different extentions
also, if you're burning a single layer dvd be sure to mark dvd-5 as dvd-9 is double layer. however, your burner should automatically make the correct choice as long as it recognizes the media.
lastly and probably of less significance to your situation, if you are using dvdr- then it's safe as older dvd players support -. if you have a newer player it may support both - and +. however, if you used hacked firmwares and have your device bitset to dvd-rom or if your device can be configured to dvd-rom then you're ok. anyway, just check the compatibility of your dvd player. it should have a sticker that tells it all