Hmm, looks like MSG+ shortened the link expiration times as well. They look like they may be keyed to the individual shows playing on the channel. I guess that means you can't use these as a long-term way to keep the channel alive in your DVR. However, you can paste it in to catch a particular sporting event, as inconvenient as that might be. The only solution would be for someone to write an on-demand link scraper utility that could grab the m3u8 when you request the channel for playback. Unfortunately that's above my pay grade. maybe someone else here can assist.
yeah that sounds way to complicated for me to even try to attempt