The Twitter approval process includes testing the experience across various platforms, as well as re-validating it periodically.
More information and how this can be done can be found here
Enable the Twitter module.
What is the player ID (uiConf ID) of the player that plays videos on Twitter? This should be a V2 play.
@username of website, to be used as value for twitter:site meta tag
Use the best quality flavor that can be played in Facebook.