Most vehicles have removable headrest pillows where you simply pull up and out. There may be a latch where the metal posts enter the seat holding them up or down that must be released as well.
Note: If there’s a wire running through your factory headrest post, STOP right there. Your vehicle may have “Active Headrest Technology” and you’ll want to keep your factory headrests in place. No worries, we also have the best-selling active headrests DVD players as well.
Note: If your vehicle seats are all one piece (like a onesie swimsuit) and you don’t have a removable headrest pillow, I’m sorry. You main option may be to explore adding a flip down DVD player.