I've edited hundreds of hours of video on my g750JX via Premiere Pro. No problems, and as of yet, no repaste (although it was repasted on day 1 by the reseller, Pro-Star).
Repasting might help, but probably not as much as you need. See the attached image for what you *need* to do.
On my JX I have a working profile, a gaming profile, and a video editing profile. This allows perfect temps at all times.
Working = stock clock 3.4, -70 undervolt
Gaming = slight overclock 3.6, -50 undervolt
Video editing = slight underclock 3.2, -70 undevolt
Honestly, the "working" profile is fine for most video editing. The only time I might switch on the "video editing" profile is for a massive export of many files. I switch on the gaming profile sometimes because the laptop has zero problems cooling during all gaming sessions, so, a bit of extra juice is welcome.
Your exact voltage may not end the the same as me, but it should be very close, or maybe even the same. You will need to do a search for the overclocking thread here on the forum to find instructions for doing this. There is zero need to overvolt the cpu. You need to undervolt it to cool it for video editing, and underclock it if you really want to keep the temps down.
edit: this is the thread https://rog.asus.com/forum/showthread.php?38049-Guide-for-Overclocking-Maximum-Stability-amp-Perform...
- CPU: i7-4700HQ @ 2.40 GHz.
- Graphics: GeForce GTX 770M 3 GB GDDR5 RAM
- Screen: 17.3' Full HD Matte Screen @ 100Hz
- Memory: 16GB DDR3 1600 MHz. RAM 2x8
- Storage: 500GB SSD 850 EVO + 750GB HDD @ 7200rpm
- OS: Windows 7 HP (x64)
- TC: IC Diamond Thermal Compound - CPU + GPU