The ultimate way to do this is "bring value to the marketplace". I have learned and realized that how we do business these days is all about relationship building! All the great leaders and the self-made millionaires/billionaires, they taught us only one amazing thing that really works! ---- "be a person of value and a person of service!". Create value. Bring value to the marketplace. Provide solutions to peoples' problem... be out there helping as many people as you can! And believe me, leads and money will naturally come. And one more thing --- by doing this, you will gave fun building your business! Think about that!
The main reason why leading world companies create accounts in social networks is to attract traffic to landing pages and websites. YouTube's video hosting by the number of search queries is second only to the Google search engine, and you can attract some of this huge traffic flow to your site / landing page by simply posting your video (and related links to your web resources) on this hosting.