To choose a processor for video editing, you have to focus on the resolution you work with and your GPU. A rule of thumb is: the higher the resolution, the more powerful processor you need. At the same time, a low-end GPU might create a bottleneck, worsening video editing performance. Therefore, you have to seek a balance between the two.
If you have a high-end GPU and want to choose the best CPU for video editing, look no farther than the Apple M1 chip. The powerful 8-core CPU will handle most of your video editing tasks with ease.