http://www.w3schools.com/ is a very popular tutorial site.
They have already started tutorials for HTML5
I see errors
autoplay ==> true | false
controls ==> true | false
As far as I know autoplay="false"
also means enable autoplay in firefox.
I wish somebody contact them to correct those and other errors.
Otherwise people start using autoplay="false" to disable autoplay.
and some vendors will start supporting that.
while others will go by w3 standards
Which in turn will bring trouble to user who surf the site
using a browser which is not the one used by the web developer.