I'm new to vShare so forgive me if this is incorrect but from what I can gather, the embed feature only appears if

a) you actually import the video into your hosting space from the provider, it will NOT appear when using the flv/embed import although you will see the providers embed code (if they have one) at the end of the video (youtube does it).

b) Embed has been enabled/allowed in the admin panel and on the individual settings.

Hope this helps!