SentrySearch enables semantic search for raw MP4 video

SentrySearch is a textbook example of "pixels-to-vectors" search, proving that intermediate text descriptions are becoming obsolete for video retrieval. Gemini Embedding 2's ability to project video and text into the same 768D vector space removes the heavy compute overhead of OCR or frame-captioning, while local indexing via ChromaDB makes it practical for privacy-sensitive footage. Automated clipping with ffmpeg provides a seamless bridge between text queries and relevant segments, though the $2.50 per hour indexing cost remains a friction point for massive archives.