2.1.36 [HTML5:2014] Section 4.7.10.6 Offsets into the media resource

V0076: The currentTime attribute returns a negative value if readyState is HAVE_NOTHING

The specification states:

 ... Offsets into the media resource
     ...
     The currentTime attribute must, on getting, return the media element's default 
     playback start position, unless that is zero, in which case it must return the 
     element's official playback position. ...

All document modes (All versions)

The currentTime attribute returns a negative value if readyState is HAVE_NOTHING.