I’ve always loved Ricoh drives. They have always made some of the strongest optics in the industry. I still have an old SCSI 6201 that works, lol. I just can’t wait 40 min to burn a CD-R anymore, lol.
Anyway, some of the real cheap standalone players will play DVD+R, but they don’t mention the capability to do so in the manual. This suggests that it may or may not read them, mostly likely depending on the DVD+R used (dye type used). The same may be true for the console systems, certain disk brands work better than others rather than disk type (DVD+R/-R).
I remember when I was still backing up my Playstation 1 games and certain brands did work better than others. Ricoh CD-R media (using they’re own special dye back then) would take longer to read or at times would not read at all, while Verbatim media (Mitsui or Mitsubishi chemicals, I can’t remember) never ever had a problem. It would make sense to me that this could carry over to DVD media and reading devices.