Longer wait for video component to appear

Fix for an acceptance test that would fail non-deterministically when it couldn't find `div.video.closed`

It appeared that the video was loading correctly, just not within the 10 second default timeout.  I set the timeout much higher (30 seconds) to improve stability -- if the video appears sooner, the test won't wait the full 30 seconds.  I don't know why the video is taking so long to load, but in the short term, I think this is a reasonable solution.

Reviewer: @auraz