Under Local Storage: You can connect your TV+Movie sources from your NAS to Channels so instead of using Plex as an example you can see all that content Channels as well.
On shows you have loaded in via "local storage" if you go to that show Library -> TV Shows -> Select Show -> scroll down to an episode -> click options on specific show -> "redetect commercials"
This will let you actually recognize commercials on local content. Its also helpful if you had originally left in credits and now want to skip/remove them.
With the Channels DVR recorded content I can move that to MCEBuddy and remove the commercials. With the content in the "local storage" though I don't see any change to the video file or comskip file. So I know Channels is saving it somewhere because its able to recognize the commercials were scanned for the specific tv show I just don't know where its being saved.