I think this was when the silver gray haired MSDNC cameraman was not wearing a mask while on-air was - but the video seems to have been scrubbed = https://www.audacy.com/newsradiowrva/blogs/jeff-katz/msnbc-cameraman-not-wearing-a-mask-during-mask-lecture
MSDNC cameraman = https://nypost.com/2020/05/27/msnbc-reporter-cal-perry-humiliated-on-air-after-mask-shaming-backfires/