This is poorly documented by Google and has been hotly debated by SEO's but has anyone actually done it?
There is no info. on Google Webmaster Forums although they recommend that a person does submit a video sitemap for embedded YouTube videos.
It is possible with Vimeo but the only methods I have seen for YouTube involve cloaking and/or dodgy/old methodology.
This question has been asked on this forum once before in 2010 but the landscape has changed a lot since then.
Has anyone had any traction with this?