Model specs for VideoInteractives pass
Fixing embeddable height to not run under buttons

[#49877927]

https://www.pivotaltracker.com/story/show/49877927
TODO note for future refactoring
Icon for the full-size link [#49883371]

https://www.pivotaltracker.com/story/show/49883371
Stopping the "hover" animation [#49883371]

The "close" button was animating to its hover state, not just changing state, which was annoying, so I've removed the hover state.

https://www.pivotaltracker.com/story/show/49883371
Merge branch 'master' into video-interactives