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If you're seeing more YouTube results then maybe it's because those things are more relevant for the search you're doing. In which case you have to look at them and see why they are more relevant, as that may be affecting your SEO campaign. If you need to get a video done to compete, then so long as it's quality and relevant (and done professionally, not rushed) then do that. Otherwise, just treat the new videos as a normal competitor and analyse it accordingly to see why they outrank other pages. SERPs change and algorithms change, so how you approach your SEO campaign as to change over time as well.

Get rid of the embed text in the header (create text in a css layer) and make these hyperlinks to relevant pages. Not a big issue, but may help. Good luck!

Hi Indexxess - I think the point is that no one knows at this point. I've seen some talk around the blogosphere and on different forums that a domain-wide 301 will sometimes rescue a site from Penguin, but not always. It's so hard to know what to tell you. I have a client who got hit that I am testing out different tactics on different domains (they had multiple sites get hit). On one, we're trying to clean up the exact anchors. On another, we're redirecting domain-wide to a new domain. On another, we're building a lot of branded links. We're doing this because no one knows what will work. I'd say you should, regardless, focus on getting good links. Get branded links. If you were hit because of a lot of exact match anchors, then you need branded anyways to balance that out. From what I've seen and heard, negative SEO could work, and people are claiming it works. But it will take a lot of time and effort to do this to your competitors, and honestly I think you could better spend time on your own site and providing value than going negative and trying to knock your competitors out. Sorry I couldn't be more helpful, but at this point, there's just a lot of conjecture and testing going on out there.

Myblogguest.com is excellent for finding guest blogs. Also you can do Press releases from sources like PR Web to build some links. Find professional voices for your health related site, network with them and get them to share your articles. I dont look at competition for their back links as much as I used to. In my opinion, it's better to invest my time doing what the competition has not done, or thought of doing and not externally rather internally. What can you give your audience? what are they looking for? etc..

Well it's all about passing the threshold of your link building profile which you don't want to do, if you have an already well established site, moderate forum links won't get you penalized. Avoid sig links like the plaque. Most blog comments are nofollow, if you find a dofollow blog and it posts without moderation it's only a matter of time before spammers start hammering the comments on that page so you'll eventually wind up in a bad neighborhood. Also if you post in a forum you can always log in and edit your post or delete your account, once a blog comment goes up it can be more difficult to get removed.