I had a link to his youtube video, but it looks like he took down his youtube account. You can watch the video here: https://www.dropbox.com/scl/fo/ho5mm103zt33w2uywzvth/h?dl=0&e=1&preview=You+Suck+at+Excel+with+Joel+Spolsky+%5BBV1734y187KS%5D.mp4&rlkey=qq3y3axe5u31goaiqffx05g32