Youtube has overtaken Yahoo and is now the number 2 search engine in the world. Attached is three months report (courtesy comscore) that clearly shows how you tube enjoys more than 2.5 B queries.
How can we benefit:
Number of Backlinks: All the links are no follow but still appear on yahoo siteexplorer.
Traffic: Drive traffic to our websites. You tube serves more than 100 million videos per day.
Thought: Links can be added in description and same videos published on our blogs. Videos ought to be very informative to have organic trafiic and hits.
PPC: Google has introduced sponsored ads model (much like google search) into Youtube (http://ads.youtube.com). Youtube now lets advertisers promote their commercial clips alongside the search results of youtube videos. In short a google monetization model for youtube.