Seeking to a value less than 'startTime' seeks to 'startTime'.
Test Result Test Assertion
Waiting ... Test passes if the text 'PASS' appears to the left and the text 'Your browser does not support media elements.' does not appear anywhere on this page.

http://www.w3.org/TR/html5/video.html#dom-media-seeking

When the user agent is required to seek to a particular new playback 
position in the media resource, it means that the user agent must run 
the following steps: 

[...]

3. If the new playback position is less than the earliest possible 
position, let it be that position instead. 

Your browser does not support media elements.