Auto-Fill is a way to quickly fill your days and get a jump start on your calendar. This is available on Android only. Use the Quick Fill feature in the iOS app!
Scroll to days with a video camera icon on them
Press the "Auto-Fill" button at the top right of the calendar screen
Tap "Keep" to save the preview or "Discard" to cancel it.
You'll be able to view your seconds before deciding if you want to keep them or not. You can cancel the process at any time.