I think it's more of a promo commercial. One of the early title cards says, "A Big Hit from America: Emmy and Golden Globe Double Recipient!!" That doesn't make sense for an intro, but it does make sense for a commercial. The marquee at the bottom after that basically just spells out the premise: Lizz Lemon—good at her job but unlucky in love.
This is what I get for believing YouTube. The YouTube fact-checking crew must really be running behind these days.