I would subscribe to SoldierOfCTK's YouTube channel. He usually records any visits of Bp Williamson to the U.S. (although I'm not certain about this visit).
Matthew was also told he'd be sent videos of any sermons given during this visit, but I don't know who'd be doing that, so we'll see. You can subscribe to the CathInfo YouTube channel, but if Matthew uploads something, he'll post it on CathInfo as well.