Hello! Are you sure we should use a complex license commons:Template:Wikimedia-screenshot, not a regular one commons:Template:MediaWiki-screenshot for screenshots from this page. The screenshots do not seem to have a lot of protected AP text.
Topic on Help talk:VisualEditor/User guide
@Quiddity (WMF) could probably give you better advice, but I think you could use the complex page if it contains any "content", and the regular MediaWiki one for "empty" screenshots (just showing the user interface, with no article content).
Also, if you are using article content from Help:Sample page to make the screenshots, then it's CC-0/public domain, so no attribution is required.