What video editor is Jungkook using in this video?

The video editor used by Jungkook in the video you mentioned is likely Adobe Premiere Pro. Adobe Premiere Pro is a professional video editing software developed by Adobe Inc. and is widely used in the film, television, and online content creation industries. It offers a comprehensive set of features and tools for video editing, color grading, audio mixing, and more, making it a popular choice among professionals and enthusiasts alike.