Recording and storing videos/programs in advance (and the stored recordings themselves). Often used for TV shows recorded for later binge-watching.
週末に見るためにドラマを撮り溜めしている。
I record dramas in advance to watch on the weekend.
HDDに撮り溜めがたまって容量が足りなくなった。
The HDD filled up with recordings and ran out of space.
旅行中に見られるように映画を撮り溜めしておいた。
I recorded movies ahead of time so I could watch them during the trip.