So, for example, if an NFL football game is scheduled from 7:00 PM until 10:00 PM, set your DVR to also record the post-game action which may run from 10:00 PM until 10:30 PM. That way, if the football game goes into a 15 minute overtime you’ll most likely get the full game.
However, sometimes baseball games can go 12 or 13 innings which can amount to over an hour of additional time. Rain delays can also hijack your DVR recording. In these cases you might end up short even if you set the DVR to record the show following. The only assurance you’ll get is to record for an even more extended time period following the scheduled game.
If recording in HD, you’ll be using up quite a bit more of your DVR’s hard drive space. But, there’s nothing worse than missing the end of a game. And, deleting unwanted sessions afterwards is easy enough.