I'd recommend this conference: https://www.natpe.com/ to get a sense of how the market works, top down. It's like what SWSW Music was, when station directors and A&R guys from labels still signed bands, but for video / tv / movie content.
Beyond that, there may be a few good options here, depending on how you'd like things to work from a business model / control perspective and the quality / profile of your video content:
Twitter Amplify - Right now, mostly working with premium content brands (think NBA et al) but the platform also works with Brightcove which might get you in through their arrangement if you're not a 'big brand'.
Ooyala - Full stack provider, similar to brightcove.
Move Networks - Similar to Ooyala and Brightcove
Blip.tv / Maker Studios - They are both a little different, but the same company. They work directly with show producers and then build channel online for distribution / syndication.
Demand Media - Seems to have moved from SEO landing pages to helping produce and distribute video content through their 'studios' effort.
If you're looking to reach more traditional users you could look at direct content licensing / distribution through:
- Apple TV
- TiVo (moving from hardware to a software based approach)
- Hulu (not sure if this is limited to only network content)
- Microsoft XBOX / XBOX ONE
I'm sure there are also specialists in content verticals, but I don't know much about that part of the market. I'd look to see where content that's inline with my content shows up and then work back from the distribution companies.