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After more than 13 years, and tens of thousands of questions, Moz Q&A closed on 12th December 2024. Whilst we’re not completely removing the content - many posts will still be possible to view - we have locked both new posts and new replies. More details here.
Hi Mike!
MozCon 2015 videos aren't available quite yet. There's a lot of post-production work that goes into them that we need to get just right. 
They _are _coming very soon, though! We're getting into the last stages. I promise, you'll know when they're ready. We'll most definitely be promoting them.
It's entirely possible that indexation issues are contributing to what you're seeing, Matt. I'd also suggest reading through this Q&A thread by Rand:
Hi there, Lauren!
An external link is one typeof hyperlink—specifically, a hyperlink that links from one domain to another. The opposite is an internal link, which links from one page on a domain to another page on that same domain. A link from moz.com to inbound.org is an external link because moz.com and inbound.org are different domains, but a link from moz.com/community/q to moz.com/community/q/what-is-the-difference-between-anchor-text-and-external-links is internal because they're both on the domain moz.com.
Anchor text is a component of all text links, whether they're internal or external. In a traditional hyperlink that appears on the page as a bit of underlined blue text, the anchor text is that blue text itself.
This is an internal link to moz.com/community/q. The destination URL is moz.com/community/q, and the anchor text is "This is an internal link to moz.com/community/q." It's internal because both the page we're currently on and the page the link points to are on the domain moz.com. Here's another link to moz.com/community/q: The Moz Q&A Forum. It has the same destination URL as the previous link, but the anchor text—"The Moz Q&A Forum"—is different.
Does that clear things up at all?
Hi Cesar!
Some folks may disagree, but I'd say they're only spammy if they're spammy. Not being indexed doesn't necessarily mean they're spam.
I assume you mean they're not indexed in Google, correct? Not that they're not indexed in Open Site Explorer?
That strikes me as a pretty massive change in rankings for a simple on-page change. Even a site-wide one, like that. Have you run any analysis on your competitors to see if anything they did might be to blame?
You know, what—I looked into this a bit more, and you actually might be right about what caused this. Let me get you some more help.
I love the answers you've already gotten, and as I so frequently do, I recommend checking out Cyrus Shepard's "Keywords to Concepts" to get an understanding of how topical search works. Yes, the keywords you've brainstormed may individually have low search volume, but you may find there's a lot of potential organic traffic outside of those terms.