What most people didn’t realize at the time, unfortunately, is rewinding VHS tapes immediately after viewing is bad for the tape. A rewound tape is tighter than a tape that is just wound through normal play and the tighter a tape is wound the worse the condition of the tape becomes. The best thing to do is rewind the tapes just prior to viewing. And while those old rewinders could still be used for that they still weren’t great for the tapes. Edit - I see @Pinknik already covered this while I was typing.