Laptop for video editing, motion graphics and grading

Looks like this thread was old and bumped, however I'll reinforce that yes the Zenbook Pro uses a PenTile (RG/BW) not-true-3840x2160 display, which makes you deal with software high-DPI scaling issues (or the need to run games in non-native res if you were to do that) without giving you the full sharpness in exchange for it. It is commonly regarded to be deceptive marketing on part of ASUS. Alternatives to the ZBP with true 3840x2160 include Lenovo Yoga 720 and Dell XPS 15.

As far as the other laptops mentioned go:

• Upcoming Zenbook Pro UX550, FHD models use a good 90% sRGB IPS FHD display
• Upcoming Zenbook Pro UX550, UHD models are not known be the real deal or more PenTile
• The ASUS Vivobook Pro N580VD, FHD models either use a very poor low-quality-TN (much worse than typical desktop TN), a 45% NTSC IPS FHD, or a 72% NTSC IPS FHD (w/ good sRGB)
• The ASUS Vivobook Pro N580VD, UHD models are already known to be PenTile / not the true res.
• The ASUS Vivobook (non-pro, M580VD) only uses a low-quality-TN.
• The Acer Predator Helios uses a 45% NTSC color gamut IPS panel which looks subjectively acceptable but doesn't have very good color accuracy in sRGB (even after calibration).
• The Dell Inspiron 7000 Gaming (7567) either uses low-quality-TN (older non "IPS" models), a 45% NTSC IPS (newer "IPS" FHD models), or a true 3840x2160 display with 73% NTSC and 97% sRGB (look up SHP1450 for details).
• The Dell Inspiron 5000 Gaming (5576, 5577) uses a low-quality-TN only. Recommendations for Dell Inspiron I think really need a qualifier for what you're referring to, since there are huge variations between all the laptops that Dell has placed under this branding.
• The ASUS ROG GL702ZC I don't think is a terrible choice for some uses but it might be heavier than you need and you might want something with better battery life.

I recommended ASUS Zenbook Pro 550VE (Newest Version) for video editing. Also list the best video editing laptop below,

ASUS VivoBook Pro or ASUS VivoBook

Acer Predator Helious

Dell Inspiron

Reference: 10 Best Laptop for Video Editing Wiknix

the intel 4 core laptop cpu's like the i7-7700HQ or i7-6700HQ (last gen) will be in your budget, very good for photo work, ok for video. davinci resolve may be the most demanding for the gpu. a gtx 1060 6gb will be good for HD and entry 4k, while the gtx 1070 will handle 4k a little better. premiere pro would likely be fine with a gtx 1050 Ti 4gb gpu.

for around $1200 you can get some laptops with i7-7700hq, gtx 1060 6gb, 16gb ram and basic storage. for around $1600-1800 you can find laptops with a gtx 1070. if working with 4k video, some laptops can be upgraded to 24-32gb of ram. with basic storage options in some laptops you may have to add some ssd's manually, or if custom ordered choose more and/or larger ssd's.

thin laptops like the asus zenbook look nice, but will have limited cooling and the performance will suffer while video editing and especially exporting/rendering. gaming laptops are thicker but also have better cooling to help prevent thermal throttling. some gaming laptops are also easier to upgrade some internal components.

Checkout the Dell XPS 9560.  Other posters in this forum have warned against ASUS ZENBOOK Pro UX501VW due to it having a "fake" matrixed 4k display.

I'm in your exact same situation.  I've ruled out the new MacBooks for being too pricey for their performance, having non-CUDA AMD gpu's (Apple is still optimizing for FCPX and OpenCL), and the gimmicky touchbar (I like having physical volume and brightness keys that I can find in the dark when I often use my laptop as a bedside tv to fall asleep to).

I really want a 2-in-1 pen enabled laptop for sketching and Zbrush, like the Surface Book or the Lenovo Yoga X1, but they're all currently sporting last year's tech, with no Thunderbolt 3.  I'm going to try to hold out my purchase until new versions of those 2-in-1's come out later this year, but depending on the freelance jobs that come in for me in the next few weeks while I'm on the road, I'll get the XPS 9560 if I have to.  It seems to be the best option at the moment for having the latest tech (7700HQ, GTX 1050, Thunderbolt 3) and being super portable.  It starts at $1000 and goes up to $2500 depending on your config.