What is the difference between rebuilding video and rebuilding all?
Only rebuild and refresh the database associated with the recording. The reconstruction speed is relatively fast, and when the factor library cannot query the video recording, you can use this to view the video recording as soon as possible.
Rebuilding the database information of all data (videos, pictures, alarms, events) takes a long time, and the first 30% of the progress is to rebuild the database of videos. Rebuilding all is generally recommended.