Embed button/code check on node submit form

When editing a node with an embedded video, there is a nice identifier for the video - host site, video ID and link to video (see attached).

It's extremely reassuring and I like it.

I thought it would be great to have the same identifier on the node submit form, perhaps with an "embed" button, so the same would be shown to the user. The module supports so many sites now, and some sites change code/formats etc. so there are bound to be some unsuccessful embeds.

Paste code - embed check - verified - reassured.

(I thought I already mentioned this somewhere else but can't find the request so..)