CONSOLE MESSAGE: line 32: TypeError: 'undefined' is not an object (evaluating 'inbandTrack1.mode = 'showing'')
This fails because our player doesn't expose embedded text tracks to the media element, I think.
Moreover content/counting-captioned.mov doesn't seem to expose subtitles tracks with GStreamer :(
I'm going to flag this test for now.
*** This bug has been marked as a duplicate of bug 103771 ***