Adding captions to video embeds/iframes

Hi there,

I’m currently trying to add captions to video embeds, with no joy.

I’ve coded the theme to display image captions successfully, and I would like to do the same for video embeds – display a subtitle.

Dues to the nature of the theme, I can only do it with attachment-based code, so I need to find some way to tell wordpress to display chosen text beneath the video, that correlates to a css class, and caption seems to be the obvious choice.

Ideally I would like shortcode to add a caption to the video, but I can’t find a way to get it working (if I copy and paste the shortcode from images, the attachment id is wrong, and I can’t find a way to get the id of the video).

Any suggestions on this greatly appreciated.