Discarded scenario recording is a holotape in Fallout 76.
Location
The holotape is found in Abbie's bunker, in a trash bin next to Abbie's workstation.
Transcript
Abbie: Scenario 5. A worst case. This recording means my bunker is running on auxiliary power. You have... ideally four hours, potentially less, to somehow restore power and save this system! Let's see. Generator manual is here. Spare parts at Thunder Mountain, that would be fun. Tools...
Forget it. There's about a million reasons here, and I seriously can't cover them all. Maybe the bunker is sinking. Maybe one of those beavers on buffout chewed through the power lines. Maybe the generator just gave up on life. Can't win 'em all, Abbie! Moving on... Another holotape for the trash.