You should select the other option "mastered" - the use like usb mean that you can go back and add/delete stuff, but this also menas the disk may not be compatible with dvd players or other computers.
Also, your dvd play may not be able to play the video files and photos - for photos it may be looking for them being in a folder and it would depend on the format of the video files - your dvd player may only play mp4 and not avi or vice versa.
Check the manual of the dvd player and be prepared to create a few test disks before you hit on the right combination.