Quad core i7 EG: 4700MQ and nvidia 850m with 16GB of RAM should do the trick.
You can probably install your own SSD and half the RAM if you want to save money.
Although for video editing I would highly recommend a desktop, which will also be far cheaper and more powerful.
The laptop is going to get massively hot under that workload
EDIT: Broadwell quad core i7 CPUs coming out during the middle of the year are meant to sort out some of that heat problem and work a bit better on video editing. If you don't need the laptop for work right now it might be worth the wait.