Answer:
ReplayTV gives you the ability to watch up to the past 72 hours (3 days) of shows, movies and sports across the majority of our channel lineups and apps –not all networks participate in ReplayTV. While the process for accessing ReplayTV is similar across devices, there are some small variances.
TV - Amazon Fire TV, Android TV and Apple TV
When a show in the live column is highlighted on the Guide screen, pressing left on the remote's directional pad brings up a display with Replay and Filter selections. Selecting Replay displays the Replay screen, listing all previously aired shows on all channels. The most recently aired show on the channel that was highlighted is selected by default, though you may select any show from any channel using the remote's scroll functions on the directional pad.
Scrolling all the way to the right while in the Replay screen displays an option for you to return to the Guide screen. Since not all programs have catch-up rights allowing them to be replayed, you may not always land on the same channel on which you started. It should also be noted that the replay option is only available for a certain period of time.
Web
When viewing on the web, once the desired live content is selected, the app will allow you to select whether you would like to join the live program in-progress or replay it from the beginning.
You may also hover over a channel row, enabling the left and right scroll arrows to appear. Using the left scroll arrow, you may select to replay any previously aired show on that channel. If you continue to scroll left, you may cycle back around to upcoming and live show tiles. The right arrow accesses upcoming shows first, however, you may cycle back around to the previously aired shows and the current live show.
Android Tablet
When viewing on Android and Apple devices, a selected live program will launch from where it currently is in-progress. If the content has replay rights, a screen will appear allowing you to select whether you would like to replay from the beginning or join the in-progress content.
iPad
Episodes on the iPad and iPhone are listed left to right in most recent to oldest order. You may restart a live program by moving the control bar to the beginning.