I generally prefer Lenovo laptops. Ultimately, it is your decision. The Lenovo 14" Z410 and 15.6" Z510 series would be fine for what you want to do. There is no configuration options so just choose the model you want. Personally, I would choose the Z510 $780 model because it has a 1920x1080 resolution screen which is better for multitasking since it can display a lot of information on the screen; it would allow me to have two documents open side-by-side, or see multiple windows / programs without having to switch back and forth.
http
/shop.lenovo.com/us/en/laptops/ideapad/z-series/
As for HP, below is a link for 15.6" HP laptops. HP allows you to customize these laptops if you wish. If I had to choose one it would probably be the ENVY 15t-j100 Select Edition for $550 and I would personally get the optional 1920x1080 resolution screen for another $50.
All HP 15.6" Laptops
HP ENVY 15t-j100 Select Edition
You do not necessarily need a 1920x1080 resolution screen to watch movies, a 1366x768 resolution screen will do just fine; many people watch 1080p movies on 1366x768 resolution screens. You can save a bit of money by not opting for it. But like I said, ultimately the choice is yours.