"While the popular Original Series and The Next Generation were mostly shot on film, the mid 90s DS9 had its visual effects shots (space battles and such) shot on video.
While you can rescan analog film at a higher resolution, video is digital and can't be rescanned."
Edit: why am I getting downvoted for asking a question? Sorry :-(
I assume your downvoting is because people (uncharitably) believed you were being an annoying pedant instead of asking a genuine question.