Long video generation blog: Six Approaches, One Decision

A few months ago we set ourselves a deceptively simple goal: produce coherent, high-quality video longer than 15 seconds, on a single GPU, in well under a minute of wall-clock time. Today's video diffusion models like Wan2.2 are good at 3–5 second clips. Stretching that to 10s, 30s, or a minute is where things get interesting. This post documents the route we actually took. We surveyed six approaches that show up in recent papers and tech reports — TTT, LoL, Self Forcing, Self Forcing++, Infinit