How do I put a picture as my default image for my gig with video?

[freelancemm]

How do I put a picture as my default image for my gig with video? Didn’t know how to phrase it better. Essentially, I want to put a picture into my gig video and have it be my display for the gig but I don’t want to end up having to delete my video. I know how to edit the video to insert the image in, I guess the question I want to ask or more confirm is that if I put the particular image in at the very beginning of the video, will that in turn make it the default image? Essentially kind of like what @madmoo does. So I guess, if you’re around I am asking you? haha, essentially just trying to make my Fiverr page look a bit more professional in regards to prep for some upcoming gigs I am making and just over-all.