It's not for you. It's for a broadcasting team so all of the wireless camera feeds are properly synced.
In what situation would nanosecond accuracy be needed between cameras? Millisecond accuracy should be enough to get camera feeds in sync, even when looking at videos frame by frame.
alt Hacker News
In what situation would nanosecond accuracy be needed between cameras? Millisecond accuracy should be enough to get camera feeds in sync, even when looking at videos frame by frame.