Hi barrynic
  Welcome to the forum. 
 You might want to have a look at the following FAQ which explains where everything is; 
www.benefitsandwork.co.uk/guides-for-claimants/faq/forum. 
 I cannot give you an answer as I have never attended a video assessment, my brother-in-law was meant to have one but on the day nothing worked so they ended up having a telephone assessment instead. 
 We will have some fellow members on this forum who have had a video assessment, they may be able to help you with your enquiry. 
 Gary