UI to create timecode links

[squiddy]

Users can link to a video at a given timecode, e.g. example.com/video/3/foo#t=3m12s, however they need to manually modify the URL. I think it would help if we could offer a 'Link to this part of the video' button that takes the current video position and creates an URL.

For this to work with Amara (UniversalSubtitles), we need a way to get the current video position out of the widget. As of now, such a function is not exposed publicly.