Hello Student

If you have done  video clipping of your interview then submit it to the authority  as a proof of your interview which you have been appeared for online. If your proof becomes irresistible then they will accept your views about your appearing for interview online. You have to mention the specific date and time of interview also, which will be  must include in your video clipping of  online interview. That will be a major proof from your side about your online interview.

Hope this will help.