This really depends on your audience and the strength of the content. What is your video about?
In general, you can start building momentum by getting your influential friends to spread the link. Then share the link with communities of your target audience (you may find the communities on Twitter, Facebook Pages, Reddit, or other forums like Hackernews).
For most websites and forums, it is usually really important to get a lot of views very early on. * The details vary depending on the ranking criteria of the websites.
