Test URLs

- https://twitter.com/reinmarpl/status/573118615274315776
- https://www.youtube.com/watch?v=GUl9_5kK9ts
- https://instagram.com/p/wZB11CIfqX/
- https://www.google.dk/maps/place/Zygmunta+S%C5%82omi%C5%84skiego+15,+Warszawa
- http://tellto.tumblr.com/post/112160646328
- https://www.flickr.com/photos/polandmfa/7005560084/
- http://i.imgur.com/Z3ilPBI.jpg
- https://open.spotify.com/track/2XsTC2dPbmWREu5RQ1mQC0

Dat rich editor

<p>Foo bar</p> <oembed>https://twitter.com/reinmarpl/status/573118615274315776</oembed> <p>Foo bar.</p> <oembed>http://i.imgur.com/Z3ilPBI.jpg</oembed> <p>Foo bar.</p>

Empty editor

<p>Foo bar.</p>