To accurately answer your question regarding the emphasis in the video compared to the article, I would need to have access to the specific content of both the article and the video. However, based on the context surrounding NASA's DART mission, it’s common for such videos to emphasize the current threat of asteroids to Earth as a way to convey the importance and urgency of the mission.
If you can provide specific details from the video or the article, I could give a more definitive answer based on that information. Otherwise, if I were to guess, the response "the current threat of asteroids to Earth" is likely to be a strong emphasis in the video.