It is important to have all of the 4 news elements because it makes the viewer more interested in the video.
It is important to have all four news elements to make an engaging story. If you don't have all four then the story may not be interesting to any of your viewers. Some elements might rely on others so it is important to add all four so your story isn't missing anything and looks off. All four news elements will make you have a very successful story.
I think it's important to have all the 4 news elements because using them engages your audience so they feel like they are in the video or are that person.It also makes a "boring" story into a great story when you use all the news elements.
It is very important to have the 4 elements of a news story in your video for various of reasons. The 4 elements add a flare to your video, and makes if more interesting than a plain video. It engages the audience, appealing to the viewers using natsound, interviews, b-roll, and voiceovers.