I discovered yesterday that my X1 has DVD player
... lol, so I also noticed the BMW restrictions to watch DVD movies only when the car is stopped. I know that is for security reasons, but I'd love that my passenger seats could watch movies in long trips...yeah, I already have an iPad to do that, but to achieve this feature, I did a research and found the site http://dvdinmotion.com
where you can buy the "dvd in motion tweak". It's not cheap, but worth the price.
It works perfect! like advertised, just put the CD and follow the instructions...two minutes later, it's unlocked! And you can reverse the tweak anytime.