Every company's in-house marketing group has it in their head that there's demand for their archived newsletter content. Having worked on the supply side of that marketing tactic, I have yet to see anything substantiate that.
Articles and videos are a different story. Over time, well-written original content is the gift that keeps on giving. The best stuff really gives wisdom away, and for that there is endless demand.
So from an information architecture perspective I think it's problematic to find the perfect single-word label to encapsulate both things the audience is looking for (wisdom, answers, inspiration) and things you want push on them via newsletter.
Focusing on that "teaching" content, I'd survey the competitive landscape of websites for inspiration and see where they put their version of the same thing, and maybe come up with some candidate labels and tree-test them with a tool like TreeJack.
Example task & results (hypothetical:)
"Where would you find videos about workplace leadership?"
Path A: Media -> Videos - 63% success rate
Path B: Content -> Videos - 48% success rate
So if you ran at least representative 100 people through such a tree test you can be comfortable those results are within a realistic ballpark.
And remember - it's marketing, not rocket science. Try something and learn as you go. Don't overdo it on statistical inference unless you have time to kill or are trying to publish a scientific paper in a journal.