Switch YouTube embed URL to be protocol independent
Switch YouTube embed URL to be protocol independent

The YouTube URL embed URL was causing problems in HTTPS environments.

I was debating switching twitter / facebook URL's as well, but I think they are HTTP only anyways.
joar/medium-editor-insert-plugin,anorudes/medium-editor-embed-plugin,joar/medium-editor-insert-plugin,fedetorre/medium-editor-insert-plugin,leafiy/medium-editor-insert-plugin,HeapCity/medium-editor-insert-plugin,HeapCity/medium-editor-insert-plugin,HeapCity/medium-editor-insert-plugin,orthes/medium-editor-insert-plugin,fedetorre/medium-editor-insert-plugin,leafiy/medium-editor-insert-plugin,utkarshx/medium-editor-insert-plugin,orthes/medium-editor-insert-plugin,fedetorre/medium-editor-insert-plugin,utkarshx/medium-editor-insert-plugin,utkarshx/medium-editor-insert-plugin,hubrick/medium-editor-insert-plugin,oosidat/medium-editor-insert-plugin,hubrick/medium-editor-insert-plugin,oosidat/medium-editor-insert-plugin