Do you also want to mention 
--disable-gesture-requirement-for-media-playback (for Android)
--use-fake-ui-for-media-stream (avoid the need for permission-granting)
--use-fake-device-for-media-stream (feed a predictable test pattern instead of live camera input)
--use-file-for-fake-video-capture=path/to/file.y4m (feed a predictable test file instead of live camera input)

(I'm a github pull requests reviewer n00b, so not sure where this comment is going vs. the other copy of hte same comment I made a minute ago...)