changing Future permalinks without changing Past permalinks

Is there a way to update permalink options for FUTURE posts without changing the permalinks to PAST posts?

I searched for this problem, but alas I don’t see it.

BACKGROUND: I jumped into a video blogging a few weeks ago, and other blogs are beginning to reference and link to my posts. My problem is that I would now like to update my permalink options to enable the post names to be included in the url’s so that searching is easier. I did this in the options section only to find that I broke ties with my links to other sites. So… I changed it back to the default quickly. I know I have other problems, but I’m taking this one day at a time. I learn by making mistakes. ??

Here I am: https://www.johnherman.org/theeye