Marketing a video site

I've noticed the video site craze going on lately, and jumped into it myself a couple weeks back. I noticed that people were getting a lot of traffic - mostly from spamming sites such as Veoh with their sites URL. Apparently, this was very effective, and brought in quite a lot of traffic for those webmasters.

Now, Veoh is being very tight on spammers, and has spam deleted daily, from all videos, and have introduced a new CAPTCHA system into commenting on videos. So, with that in place, what do you think is the best way to market a video site (such as an anime video site)?

I'm also interested in the SEO side of things, so good ways to get decent backlinks to increase search engine visibility.

Thanks.