I don't know if it works or not (I, myself never tried before.), but if upload a new chapter, you can switch the editor (under the text window, there's a link), and the other editor has an "Insert" menu, and if you click on it, you can choose "Insert video". I hope it helps. Unni came back here. :)

Upload it in youtube and then embed the code here

http://www.asianfanfics.com/blog/view/637881