* 편집하다 (pyeonjibhada): This is the most general and widely used verb meaning "to edit." It's suitable for editing text, video, audio, or images.
* 수정하다 (sujeonghda): This verb means "to correct" or "to modify." It's often used when making smaller changes or corrections to something already existing. It implies a focus on fixing errors rather than overall restructuring.
Therefore, the best choice depends on what you are editing. If you're making large changes to a video, 편집하다 is better. If you're just fixing a few typos, 수정하다 might be more appropriate.