Do webisodes and web series count as TV? I dunno, but David Wain’s “Wainy Days” for My Damn Channel looks better than 90% of televised sitcoms, so I’m forging ahead with this post. In this video, Wain — a co-creator of “The State” and the director of last year’s Role Models — recaps the first three seasons of “Wainy Days” and previews the fourth season, which debuts on May 7th. Lots of cool cameos here, including Elisabeth Banks, Paul Rudd, Michael Showalter, Jonah Hill, your mom, and more. Your mom plays a total slut. Must’ve been a real stretch.