"Play" icon over YouTube/Vimeo embed & a separate URL when people click.
We use the Video embed on Landing Pages quite a bit, but never in emails. Speaking with our Eloqua clients, many are the same. The challenge using it in an email is that it's not really clear that it's a video. We find many Eloqua users are creating .JPG's with a YouTube style play icon and then putting a URL behind that - rendering the Eloqua out of the box Video function a little useless.
See suggested example below.
Second Dream It - We rarely want people clicking on videos and being taken to YouTube or Vimeo. We want them take to our Eloqua Landing Page where the video is embedded. Another reason we don't use the Video feature in the email design editor.