Yes, all our headrest packages include a built-in DVD player inside each headrest.  Some merchants sell a less expensive package where only one headrest has a built-in DVD player and the other unit is only a monitor.  No worries when buying from OnFair, we always include 2 DVD players with our double headrest packages.

Each headrest functions as an independent unit.  You can watch one DVD on the left headrest and at the same time watch another DVD on the right headrest without interference.  Because the units have two audio channels for the wireless headphones, you can select the A channel for the wireless headphones on one headrest and then select the B channel on the other headrest to ensure the audio signals do not interfere with each other.