No source video? Not a problem. Give a topic, the bot writes a script, voices it, and builds a vertical clip from scratch. Here's what happens at every step.
A real incident: a model made up the plot of a real book and told it as fact. Why this happens with AI topic videos, and how it's stopped at the architecture level.
"Smart crop" isn't one algorithm for every case. The bot first figures out what's actually in the frame, then decides how to cut it to 9:16.
A video that looks like a messenger conversation on a phone screen — with zero seconds of actual video. Who writes the lines, who voices them, and how it differs from topic mode.