Adult SEO is in fact very different from what we call mainstream SEO. But it's not true that the only way to rank adult sites is through black hat techniques. Many of the methods used are similar to those used in mainstream, there's just fewer linking resources available for adult websites.
This video offers a summary of the primary differences between adult and mainstream SEO:
As Sarah mentioned, it's important to have a good network in adult, it's through them that you will be able to best negotiate links, marketing promotions and content partnerships.
Adarsh approached it the right way by targeting tubes. Another way you can expand on the exposure you get from them is to apply for content partner accounts. With partner accounts you can submit watermarked videos that also display a link along with a full description below each video. And with the thousands of adult tubes offering content partner accounts it is a great white hat method of building links.
I know I came to this blog post late, but if anyone wants to chat about adult SEO I'm always around, I've worked in this industry for over 12 years and run Adult SEO Training in addition to working with adult clients.
It's a challenging industry for sure, but the community is small and a lot of fun to work in.
