For a start, I wasn’t sure whether any HBO or CINEMAX recordings I made will remain when the preview ended (which was today).
So far, so good but I will feel more confident tomorrow.
I think it was when I had DISH. DVR recordings only worked provided you still had the channel. So, any recordings you made disappeared when the preview ended. They tried to get you to sign-up for that channel.
As far as I can the TDS TV preview ended today. The HBO and Cinemax channels no longer appear on the Guide.
But, the FEW recordings I made are still there — and they play.
So, hope this helps.