It's for people who use TV or spoken audio (podcast / radio show) as an environmental sleep aid / sleep cue. Electronics in general are suboptimal options for this but it's a common one that works well enough for some people.

They're falling asleep to it, but they're usually still kinda paying attention to the chronological plot, so they want it to keep their place just after they slip into unconsciousness so they can just rewind 30-60min and keep watching from where they were instead of waking up 8 hours and a full season into the show later.

Also some similar utility for people watching TV while doing chores who are just gonna kind of wander off near the end.