It's official: Anthony Weiner will attempt a political comeback of huge proportions and run for mayor of New York City this year.

Just two years after resigning his congressional seat after posting lewd pictures of himself to Twitter and then lying about it, Weiner launched his campaign with a Web video posted late Tuesday.

In the video -- which reporters caught Weiner shooting last week -- the former congressman asks for "a second chance" and prominently features his family, including wife Huma Abedin.

"Look, I made some big mistakes, and I let a lot of people down," Weiner, a Democrat,  says after outlining his platform of a more affordable New York. "But I've also learned some tough lessons. I'm running for mayor because I've been fighting for the middle class and those struggling to make it my entire life. And I hope I get a second chance to work for you."

Abedin closes the ad by saying: "We love this city, and no one will work harder to make it better than Anthony."

Mayor Michael Bloomberg (I) is term-limited. City Council Speaker Christine Quinn so far leads a crowded field in the Democratic primary that, in addition to Weiner, also includes 2009 nominee Bill Thompson, Public Advocate Bill de Blasio and Comptroller John Liu.