There are rewind and fast forward arrows in the top right hand corner of the video.
Until you complete a module you will only be able to rewind the video.
If you do rewind it then you will not be able to fast forward to the spot you were up to, the video recommences from the point you rewind to.
Once you have completed a module (and answered the questions) you will be able to rewind and fast forward freely throughout the video.
The space in between the arrows will indicate what section of the course you are up to.
If you hover over that space the full course content will drop down.
You can then click on any of the content (that has been completed) to go straight to that section.