In certain embodiments, a mobile video system is provided that includes a first entertainment system mountable in a first headrest of a vehicle. The first entertainment system includes a first input having a structure and a first output having a structure. The mobile video system also includes a second entertainment system mountable in a second headrest of a vehicle. The second entertainment system includes a second input and a second output. The second input has a structure the same as the structure of the first input and the second output has a structure the same as the structure of the first output. The mobile video system also includes an adapter configured to couple the first input with the second output and the second input with the first output.