From Hollywood to indie and amateur projects, video editing computers and workstations have become mandatory in film and the visual arts. If you want to be the next CGI master, then not just any computer will do. Video editing and 3D rendering taxes the performance of just about every component of a modern computer. Your rendering software will need as many cores and threads as you can throw at it. For this type of work the number of threads or tasks the processor can do at the same time is more important than raw speed. Although, if you can afford to have both that's even better.
These days the CPU doesn't have to render video by itself. Even mid-range modern graphics processors can accelerate video rendering speed and can really smooth things out while editing as well. Rendering 3D objects and scenery of course requires even more graphics workload and benefits from higher-end graphics chips. While performance components get the headlines, they are not the only consideration for video and 3D rendering. These PC computers for video editing should be quiet, look good in the workspace, and have components that are reliable. For example, when rendering a 30-hour or 40-hour job, a mid-range power supply is a problem you can't afford. Running all of the high-end quality components all at once for long periods of time requires the power supply to be just as high-end and efficient.