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There are some settings within Safari that will prevent Vizy's video window from displaying live video.
Go to Preferences➜Websites➜Auto-Play and make sure that Stop Media with Sound
is set When visiting other websites
. This is the default setting. Alternatively, you can set this for vizy.local
. (A setting of Never Auto-Play
will result in the Vizy's video not playing.)
If you still see no video window, you may need to enable the Develop
menu and select Develop➜Disable ICE Candidate Restrictions from Develop➜WebRTC to see video images from Vizy: