Review on High-Quality Tablet Mount for Car Headrest - Multi-Passenger Backseat Holder Stand Compatible with Tablets: Apple iPad PRO Air Mini, Samsung Tab A E S4 - Anti-Vibration Swivel Cradle (7-15 inch displays) by Edgar Rowe

Bought for long journeys. It stays installed in the car all the time, but we only let the kids watch the video when we're in the car for a few hours. Works great with the iPad and both rear passengers can see it perfectly when it slides out in the middle. Be sure to get a headphone splitter so you don't have to listen to the program you're watching in the back seat. Four stars because the little feet that hold the tablet to the mount vibrate when not in use and can easily get lost.