Comment 30 for bug 412647

Re: comment 16, captioning-related URLs from maikmerten on #whatwg:
http://trac.annodex.net/wiki/CmmlSubtitles
http://wiki.xiph.org/index.php/Ogg_Skeleton
http://svn.xiph.org/trunk/writ/

(Annodex and Writ are different.)