FollowedChanged: triggers when the followed driver changes (e.g. you switch the camera to another driver)
CameraChanged: triggers when the camera (group) changes (e.g. you switch to another camera view).
When running a theme in ATVO with no iRacing connection (iRacing is not running), the theme data bindings will now update 1x per second. This should refresh for example Input text bindings and Spreadsheet bindings. For Spreadsheets, you need to take two steps to allow "live" updating of the data:
Disable the new 'Cache data' property.
Point the theme to an external spreadsheet file (not the one copied to your theme folder) via the 'External Filepath' property.
Now update this external file and it should update the bindings when iRacing is not running.
Please note: as soon as ATVO connects to iRacing, this offline updating is disabled and normal data binding starts.