BTW, I just posted a variation of this script in another forum, and as part of that, provide a "before/after" of some really lousy LP (6-hour mode) VHS tape that was captured without a TBC. Make sure to view this full screen, and after going to full screen, set the resolution to 1080p. I up-res'd the video to make sure that YouTube didn't fuzz it up too much, and you really can see more of the awful stuff in the before image if you set the resolution to HD. Here is the link:
https://www.youtube.com/watch?v=7a9KSQvDZlw