Difference between HTML and HTML 5

We have discussed about the differences between HTML(old version) and HTML 5. And we came to know some of the differences like in the old version of HTML, audio and video are not part of HTML 4 specification. Where as audio and video are integral part of HTML 5 specification. We can insert any kind of audio and video in HTML 5. In HTML old version DOCTYPE is much longer as it is based on SGML-based. DOCTYPE is required to enable standards for HTML document in HTML 5. There are new elements in HTML 5 which includes header, footer, navigation, article, aside, figure, time, meter, command, menu, etc..It was very informative because through HTML 5, we can include so many different features in our web page.