WordPress Multisite Network – Changing Content on All Sites

I am using WordPress Multisite Network. We have a template site that we use to clone sites as we get requests. So all the sites are completely the same with some personalized content for each site.

Mostly the content is some minor text, graphics and mostly youtube embedded links.

Let’s say we need to change a video link with a new one on all the sites. How can I do that without having to manually go into each site to make the changes? Are there tools that can makes the changes to all the sites at once?

Thanks for your support.