Can you successfully navigate a rover on another planet?
One-way Video Delay
This page works with any Webcam that returns an IMAGE via a specific URL. The script makes a request every hundred milliseconds or so to this, to simulate a live video feed -- but delays displaying the image for delay specified by the slider.
For our rover camera, we used an iPhone running Videography. The URL to enter is then: http://<Videography IP>/service/camera/image
Any webcam app that supports CORS requests should work. See README.