There is only one file type that uses the .TVRECORDING extension:
BoinxTV TV recording
Temporary recording file used by BoinxTV, a video editor used to produce broadcasts such as lectures, podcasts, sermons, and more; contains a video recording while BoinxTV finalizes writing the video as a .MOV QuickTime file.
TVRECORDING files are used temporarily by BoinxTV while writing a MOV file or as a backup recording in case of a crash during recording. If a crash occurs, double click the TVRECORDING file, once it is restored, you can delete the TVRECORDING file.
NOTE: BoinxTV was succeeded by mimoLive and the TVRECORDING file is no longer used.
Updated: April 13, 2017