Solar and batteries. Ive been doing ham radio off the grid for ten years. Little DVD players use almost no power.
I have handhelds for doing public service stuff (ARES/RACES). Fire breathers (80 watts on 2m/70cm) and mobile HF that runs nicely on a cigarette lighter. Normally I have a mobile emergency services mindset. Perhaps, not mobile with the emerging threat. My wife is also licensed and add that to her credentials as a police/fire/EMS/911 dispatcher. Out of the office, she does ARES/Animal Rescue Reserve.
I have a feeling if the SHTF then watching DVD’s will become lower on the priority list, when starving mobs are searching for food.