Example 1: Youtube's standard code:

This is a standard implementation of code provided by YouTube. View source to see their code.

Validation Errors:

Check the validation errors right here!

Example 2: Our XHTML Validating YouTube code:

Here's an example of the same video, loaded using our validating code. Not only does this validate, but it is considerably lighter than the standard YouTube code.

To see how we accomplished everything, view our source code!
Note that Safari users will need to press option + command + u to view source, while Internet Explorer 7 users will need to select "View," "Source" in the toolbar.