Remember to cover the basics, that is, what you expected to happen and what in fact did happen. You don't know how to make a good report? See
http://orgmode.org/manual/Feedback.html#Feedback Your bug report will be posted to the Org-mode mailing list. ------------------------------------------------------------------------ HTML5 fancy block names must be in lowercase but documentation example shows in uppercase. I don't know if it is documentation or coding bug. For example, the following code does not works: #+BEGIN_ASIDE Everything should be made as simple as possible, but not any simpler --Albert Einstein #+END_ASIDE It shows a <div> container with class "ASIDE", but with the block name in lowercase as following works: #+BEGIN_aside Everything should be made as simple as possible, but not any simpler --Albert Einstein #+END_aside I tested also with the <video> tag. Same problem. Thanks, Guilherme Emacs : GNU Emacs 24.4.1 (x86_64-pc-linux-gnu, GTK+ Version 3.14.5) of 2015-03-07 on trouble, modified by Debian Package: Org-mode version 8.3.4 (8.3.4-20-g6f439a-elpaplus @ /home/semente/.emacs.d/elpa/org-plus-contrib-20160321/) -- Guilherme Gondim