Interesting, as "content" on its own has been / can still be a somewhat dirty word in this context. Some folks who write stories, take photos, or shoot video don't appreciate their works referred to as content. Some still prefer author, photographer, film maker to "content creator." But it's a handy, encompassing term.

When multiple authors, photographers, videographers create works around similar topics and themes, "content verticals" can be a useful term. Still some have little love for it.