InfinityEdit: Infinite Video Editing with a Lightweight Edit-Ignition Adapter

Formalizes 'infinite video editing': given a preceding segment and an edit request, the model must generate the next segment that continues the stream under that edit, repeating indefinitely. A lightweight adapter with three attention blocks (history cross-attention, causal temporal self-attention, edit cross-attention) is selectively activated only in the chunk where an edit arrives; later chunks revert to the base model with a reset anchor.