Please see the screenshots beneath. My grandma doesn't want 'Zoe Video Editor' at all, not even "the factory version" or any speck of it. But her HTC Desire 825 isn't letting her delete it.
If there are system apps then she won't be able to delete them unless the device is rooted (I doubt your grand mother has rooted her phone). With no root, you are left with disabling them. Settings -> Apps, select the app, then click on Disable.
If you are unable to disable them via the settings as indicated above, then try disabling them via adb as shown in this answer.