Could someone host a portion of a recording from your channel 4?
A segment that contains show (3 minutes at least), commercial, show (another 3 minutes at minimum), would be enough.
For those impossible channels, agressive segmentation usually works better, with edge profile neutral.

I doubt you'll find settings that work on all channels. It just doesn't happen, because of the way they go to and from commercials. I have different profiles set up, to the point where I almost need a different one for each channel.