The detailed error information of the local video.
4: The local video capture fails. Check whether the capturer is working properly.
6: (iOS only) The application is in the background.
7: (iOS only) The application is running in Slide Over, Split View, or Picture in Picture mode.
3: The local video capturer is in use.
2: No permission to use the local video device.
8: The SDK cannot find the local video capture device.
5: The local video encoding fails.
1: No specified reason for the local video failure.
0: The local video is normal.