Set the parent page to gallery page

How can I change the single’s video parent page to video gallery?

I saw you can change the base slug of single video pages.

For instance I’ve changed it from “videos” to “nuestros-videos” where “nuestros-videos” is the slug for the built-in video gallery of this plugin.

But when I do it, the video permalinks don’t work any more and the site shows a 404 page.

I’d like that the breadcrumbs and the single video urls to show the video gallery as a parent page.

How can I achieve this?

Thanks!