What if advanced video monitoring in your case is somewhat of an overkill, but your project or pilot could benefit from basic motion activated photo capture at low cost?
How about an ESP32-CAM based solution? With a board price of $7.99 you can start working on a new project at minimal upfront cost.
Publishing the photo shots made with ESP32-CAM into MQTT broker makes them easily available across the IoT infrastructure while using flespi also enables convenient access via REST API.
Check the detailed step-by-step guide on connecting the ESP32-CAM board to MQTT broker and saving pictures in JSON messages in flespi: