Hi Shema,
If you need the video lessons, there is an option to download them to your computer for offline viewing.
I'd spend the next 3 hours doing as much mock questions as you can, and review each wrong answers afterwards.
There are other sources of mock exams out there, I recommend doing the 100-question exam from the Oliver Lehmann website.
How did you do on your last 3 mock exams?
Remember to relax and try to stay worry-free prior to the exam, I found that helped alot for me.
Good luck on Sep 20th!
Joe