I noticed that when I add a movie or TV Show the DVR will perform "Generating video index for file-67056:" then it will list the name of the TV Show or Movie after the colon.
I searched the forum and I see mentions of it being recommened for some trouble files to manually run it as a possible fix or for some other uses but I can't seem to find anywhere that says what exactely it is or what it does and why Channels is running it automatically on every file I add.
In fact, a few months ago I had to re-add my movies and it ran this process on all of my movies and it took over 24 hours to do every one of them. I have over 900 movie rips on my NAS.