Ability to add border or stroke to any image or video element

[marcusvowell]

It seems like it would be relatively easy to have an attribute for any video or image element that allowed you to add a stroke of any color, thickness, and corner roundedness, like shapes do in Photoshop or Illustrator. This would be particularly useful for any instance of picture-in-picture type use. There are a number of inelegant workarounds for this, of course, but they're all a major pain to implement.

Thanks!