StreetCast

StreetCast turns hours of street video into a cited record of what's blocking New York's streets, and helps people act on it. For riders (Ride report): a delivery cyclist records her ride. StreetCast replays it and every problem lands as a field note: blocked bike lanes, double parking, trash, obstructions, graffiti, construction. Each one comes with a drafted 311 complaint: category, street, what happened, the company and fleet number, and a link to the exact clip. It also shows how much time she lost and what caused it. Fleet numbers, never license plates: accountability for companies, privacy for people. For newsrooms (Your Block): a producer picks a neighborhood, a time of day and a travel mode. StreetCast runs six searches across the footage and builds a one-minute narrated segment. Every sentence cites the clip and time range it came from. No clip, no sentence. Eval: claims are checked against the clips they cite, and we report the grounding rate. How it works: VAST stores, indexes and searches the footage in VastDB. NVIDIA Cosmos Reason describes every clip, Cosmos Embed powers the search, and YOLO11 detects objects. An LLM on W&B Inference turns those descriptions into structured events and scripts, with every call traced in Weave. Built with Cursor. Rider files it. The city sees it. The newsroom airs it.