Finally, we used each program to compress a 4K video file into a smaller resolution. We then examined the results looking for imperfections in the picture such as compression artifacts, motion blur, distortion, ghosting and more. PowerDirector’s results were simply outstanding. We could find almost no indication that the video had been compressed, even when viewed on an ultra-high-definition monitor.

One of the cheaper options around ($49.99), Nero Video holds its own on this list—it comes well-stocked with a lot of the tricks and effects you’ll find among other products vying for video editing supremacy, and as far as software for beginners, you can certainly do worse. If you’re going to spend money learning how to edit videos, however, you might want to steer clear. Nero just doesn’t have the speed and functionality of some of the other products listed here, and if it’s value proposition is its price, $50 is still not all that cheap.  
Support for 4K video source content has become pretty standard in video editing software, but the support varies among the products. For example, some but not all of the applications can import Sony XAVC and XAVC-S formats, which are used by Sony's popular DSLRs, mirrorless cameras, camcorders, and professional video cameras. The same holds true for the H.265 High Efficiency Video Coding (HEVC) standard. Most of the applications here now can import and export HEVC, though there are still a few holdouts.
We combined a text opener with five clips linked by a cross-fade-type transition into a 2.5-minute video shot at 60 frames per second, and rendered the projects to the MPEG-4 format at 720p. We timed rendering at both 60 fps and 30 fps. We adjusted settings to take advantage of hardware acceleration for all tests whenever possible, setting them in either the preferences or the rendering controls for the best speeds. Apple’s iMovie, the lone Mac-only app, is not included in the timed comparisons.