Are there DVD players in the room or does the hotel have them for use?
My stay was for a very short time. Checked in late and checked out early and don't remember seeing DVD player in the room.
I don't recall seeing one in the room either. They might have them available to borrow or rent from the front desk, but I'm pretty sure they don't come in the room by default.
Get an answer from Country Inn & Suites By Carlson, Chicago O'Hare South staff and past guests.