As far as I know, channel information is not maintained after the recording has completed and it has been moved into your library. I checked a few of mine (and the XML data associated with them) and didn’t see the channel information. However, you can likely infer it from the logo in the video, if one is present. Many (most?) stations place one in one of the corners (bottom-right, usually) of the video.
If you do find that there are EPG data inaccuracies, you can report them here:
