Anyone with an event's code can register. Remove takes one person out of one event, and Block stops that device entirely.
Someone who clears their browser could register again, so for a hard cut-off, change the event's code (Edit next to the event).
Upload pit stop videos
FileCameraStop #LabelCar
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Share with the crew
On the same Wi-Fi as this computer:
Access codes
On iPhone: Share → Add to Home Screen. On Android: ⋮ → Install app. It then opens like an app.