How to fake stream to Chrome instead of using WebCam
I solved that converting a mp4 file to mjpeg, which is a format that also can be used, and setting my chromedriver same as you did, but using a relative path to the file.
options.addArguments("--use-fake-ui-for-media-stream", "--use-fake-device-for-media-stream", "--use-file-for-fake-video-capture=src/test/resources/sample_640x360.mjpeg"); This thread helped me to get there: https://stackoverflow.com/a/52188760/1843429