if you can wait a bit pick up the skylake i5 unlocked cpu and an asus ar z170 mb. right now the chips are tight to get.
if you pick up your parts after the holidays the nwait for the newer nvidia pascal for your gpu. as your going to do video editing pick up a 16g kit. of ddr4 ram.
Changed the PSU to a lot higher quality one. SuperNova NEX is a bad psu to have in a build like this.
Also changed RAM to slightly higher clocked one since there wasn't much price difference.