Screenshots are alive and well, though now someone is recording video and extracting frames from it to construct their narrative. It’s more useful for top-down and/or slower paced gameplay; looking at SomethingAwful the first page of LPs are roughly split 50/50. And it does allow for spontaneous collaboration, whether through asking the viewer to choose a direction or more naturally from the author/viewers themselves (as seen in the Lobotomy Corporation LP).