What is difference between HTML and HTML5?

The differences between HTML and HTML5 are:

1. Document of HTML is very large as compare to the HTML5.
2. Audio and Video tags are not present in HTML whereas HTML5 contains audio and video tags.
3. Vector technology is not integral part of HTML whereas HTML5 Vector technology is the integral part of it.
4. HTML supported by all old browsers whereas HTML5 is supported by new browser.
5. In HTML web sockets are not available whereas in HTML5 Full duplex communication channel is present.