Here is an new Gigabyte laptop the Aero 14 that sounds great for a traveler. It will not be released and priced until Computex (next week) but it has a great i7-6700HQ CPU, up to 32 GB of RAM, either a GTX 965M or a GTX 970M GPU, PLUS two M.2 PCIe storage SSD slots all in a 4 pound 20 mm thick package.
I do hope you realize that for video editing you do have to be AC powered! And to use a 14" 2560 x 1440 IPS panel you need a good set of eyes, not like my old eyes.
Your choice Lenovo y50 is good but it gives only 4 - 5 hours of battery backup,As you said you are going America so you should have a laptop that did not disappoint you ever during travelling. I think selection of laptop that gives you more battery timing (around 10 to 12 hours ) would be a wise decision. Some travel laptops like Chrome Book pro, Microsoft Surface pro and others could be considered.Do also use Vlogging camera
Here's the problem with your suggestion, Dani:
Serious compromises must be made between portability, performance and battery life. One can have no more than two of those three in the same machine. Machines that have the longest battery life are either too underpowered for video editing or are so large and heavy that one might as well lug a huge desktop or server tower across the country.
And you failed to realize that a laptop should be plugged into an AC mains outlet in order to edit video anyway. You see, most laptops throttle down the CPU clock speed or (worse) semi-permanently lock the CPU clock to its lowest, fail-safe speed when on battery power. This may result in an error message that the laptop does not meet minimum system requirements to run the program when the laptop is on battery power.