Used randomiser but cannot see which information was seen first?

Hello, I was wondering if someone could help me, I am conducting a repeated measures survey and I have used the randomiser for 2 videos that I have embedded onto my survey. However, I do not know which video participants have seen first and I need to be able to see this as questionnaires are filled out before and after each video. Is there something I need to do in data & analysis to be able to see what video was seen first by each participant? Thank you to anyone that can help!