Probably the best option for portability, IPS screen with wide color range, and enough horsepower for video editing is getting a Dell XPS 15. They offer quad core i7s and dedicated GeForce 1050 graphics. I just bought a Lenovo Yoga 720-15IBK, thinking I'd like to have a 2 in 1 . The Lenovo is the only 2 in 1 that has a quad core i7 and the GeForce 1050. I got the version with a 4K monitor that is IPS (but isn't quite as bright and has a slightly narrower color gamut as the XPS 15). It was cheaper, and was looking forward to having it double as a drawing/ 3D modeling tool as well (bought the Wacom Bamboo Ink). I saw rosy reviews for it online, and have found my unit is pretty solid with no screen wobble. However, while installing more software on it today, I noticed a diagonal black line on the top of the display. I then googled and found a long thread on Lenovo's site with other Yoga 720 4K owners having the same diagonal bar issue. It's rumored that Lenovo has a fix for it now. While chatting with support today, they said I could either return the laptop to my retailer (Best Buy), or send it for repair. Since the thread had owners who exchanged their units with new ones that would exhibit the same problem, I've decided to try the Lenovo repair service. Looks like it's going to be over a week of them sending a box (they recommend not shipping my laptop with original packaging since I won't see it again), repair (if the parts are in), and send back to me. But I'm going through with it, since the laptop was a good deal and has better specs then the other 2 in 1s.
The XPS 15 has been out for awhile, and I know owners who haven't had any hardware issues. Most laptops seem to have i7 dual core processors to have better battery life. Fewer laptops offer higher performance with the i7 quad core. I know one person who just recently got a XPS, and he said that the computer itself works really well...but he finds the new trackpad software annoying (IE it automatically trying to snap a window to the edge of the screen while you just want to drag it slightly). If you're the sort to uninstall bloatware as soon as you get a new computer, then you might not run into that issue.