Compact in terms of programming and scale, the Slamdance Film Festival offers a refreshing grassroots alternative to the Sundance Film Festival’s glamour. This year’s program includes several markedly similar attempts to tell fictional stories within a documentary framework. These aren’t lighthearted mockumentaries of the Christopher Guest variety: YouTube generation filmmakers have adapted the style as a non-ironic storytelling device–and when the tactic works, it’s stunning.