html5 writing and video attempt

I am trying to learn how to code in html5 adding the video element. However, it is difficult to find a source that will actually play.This one that I think now works comes from the Internet Archive, and is under the Creative Copyright listed for this video. Attribution: Coffeehouse_tch_142 by Mark Cohen.Seems to work in Chrome. Works in Firefox with html5 extension. Might work on some tablets and phones. Doesn't work in IE. Appropriate links to give credit: https://archive.org/details/coffeehouse_tch_142 http://creativecommons.org/licenses/by-nc-nd/3.0/us/ Sometimes,I don't know why, this post craps out. Just refresh the browser until it plays.