Webcam Surveyor 4.0.0 is Windows webcam recording and video surveillance software for homes, offices and other spaces monitored with USB cameras. Multi-Camera Mode runs separate application instances so several cameras can record and monitor at the same time. The new video core supports modern workflows, including MKV output, 4K formats and high-frame-rate cameras. Hardware-accelerated encoding is available when supported by the selected encoder, GPU and drivers. A fast motion detector is optimized for high-resolution video. Improved Motion Capture uses a configurable ring buffer to include footage from before and after motion is detected, helping preserve the complete event while reducing unnecessary recording. Alerts can be delivered by email, Telegram, Discord or a Webhook API. A personal Telegram bot also provides remote interaction and lets you select a camera in a multi-camera setup. Webcam Surveyor can record video with audio, take snapshots, create time-lapse image sequences, broadcast video and audio over a local network or the Internet, run scheduled tasks, operate in stealth mode and organize recordings in its built-in file browser. Video post-processing includes digital zoom and image flip. Version 4.0.0 also introduces a refreshed HiDPI-friendly interface and dark mode.