It's like a broadcast channel for 4AD ... they've launched a new part of their web site called 4AD Sessions: it's a place that features a series of video recordings of live music from artists on the 4AD label.
They've launched the first session with Tune-Yards, the musical vehicle of Merrill Garbus. She and Nate Brenner are portrayed in a dramatically-lit studio, playing 5 of their songs live.