It's called Mea Maximus Culpa, and it apparently shows that Pope B16 knew about every child sex abuse case in the church since 2001.

The link below has the trailer of the doc, and also a great write-up of the current shabby state of the church hierarchy from Andrew Sullivan:
But he grew old, this knight so bold / And upon his heart a shadow / Fell as he found / No spot on the ground / That looked like El Dorado.