Blender as a VSE and slow video rendering


I am using Blender for basic video editing and rendering for my Youtube channel, and I was wandering:

Why doesn’t Blender use my CPU at 100% while it is rendering my videos? Also, it seems that it doesn’t use all the treads (4 out of 8). Any idea, solution for this? Is it normal?

My CPU is an i7 4770K and I have 8GB of RAM.

Thanks for the reply!
Nothing worked though. The best solution I came up with, is having 2 instances of Blender running simultaneously, and rendering 2 videos together! Worked like a charm! :slight_smile: