Sometimes it seems that a video is obsolete practically as soon as it is completed. That would be a concern.
There are ways of updating a video: a narration can be rewritten and rerecorded; titles and captions can be substituted; and whole segments or single shots can be removed and new ones added.
Usually there is a way of updating a video to keep it current without going to the trouble of producing the whole project afresh.
Here are some short, yet interesting, examples of videos we have changed for clients.