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YouTube now allows deep linking to videos, or linking to a spot deep within a YouTube video so that when launched, the video starts at the minute and second that you ask it to, rather than at the beginning.

Here is how it works: Simply add #t=1m19s to the end of the YouTube video URL to start the video 1 minute and 19 seconds into the video.

Launch the “Where the Hell is Matt” video at the beginning:

http://www.youtube.com/watch?v=zlfKdbWwruY

Launch the “Where the Hell is Matt” video in Zambia, one minute and 19 seconds into it:

http://www.youtube.com/watch?v=zlfKdbWwruY#t=1m19s

I tried it a bunch of things but it does not seem to work yet for embedded videos from YouTube.

I did, however, figure out how to change the YouTube Embed Code so that it will produce valid XHTML:

YouTube Embed Code Before Changes to Valid XHTML

YouTube Embed Code Before Changes to Valid XHTML

This produces invalid XHTML:

YouTube Standard Embed Code Produces Invalid XHTML

YouTube Embed Code After Changes to Valid XHTML

YouTube Embed Code After Changes to Valid XHTML

Now the Validator passes the test:

Modified YouTube Embed Code Produces Valid XHTML