After spending much time and money investing in my minivan trying to create my own portable video system I have concluded that the cheapest option is for my family members to watch and/or listen to their media on separate iOS devices. The audio can be put out onto our sound system but that only benefits 1 device.
What I desperately want to find is a solution that will play video on multiple iOS devices and keep them in sync. Push play on one device and they all start playing. Push pause on another device and they all pause. It would even be fine for 1 device to be the master device. I have looked into Airplay solutions but you can only Airplay from 1 device to 1 device. Even if you could Airplay from 1 device while also watching on that device it would be some progress. Unfortunately when you Airplay from a device it just puts up a logo saying that your video is showing up on the remote device.
Anyone have any advice? All devices are currently jailbroken, but that has't helped much.