This looks like a halo/double-edge artifact, most likely caused by the camera’s own image processing rather than a simple optical aberration. Community answers suggest two plausible causes: aggressive in-camera sharpening/HDR/noise-reduction processing, or a secondary reflected image from angled glass in front of the lens that sharpening then exaggerates.

In either case, correction after recording is usually very limited. Once the camera has already applied heavy processing and compressed the video, missing detail is gone—you generally can’t “subtract” the halo and recover true sharpness. If there’s reflected double imaging from glass, that is also hard to remove reliably without access to cleaner source data.

So: you should not expect a major improvement in sharpness from post-processing existing footage. The practical fix is at capture: disable or reduce sharpening/HDR/noise processing if possible, avoid shooting through angled protective glass, and work from raw or less-processed footage when available.