Need to change video thumbnail. please

Hi there!Jon has previously handled this for someone else, but I need to change the video thumbnail for one of my clips, please - we used to be able to do this on our own.Name URL: https://pro.imdb.com/name/nm10110526?ref_=hm_prof_photoVideo URL: https://pro.imdb.com/video/vi977389593/?ref_=nmvi_vi_4Desired thumnail timestamp: 00:44 Thank you so much!