A: Yes, using HandBrake or FFmpeg. But you’ll lose quality compared to a native 480p encode.
At first glance, the answer seems obvious: 1080p is sharper, so it must be better. But depending on your device, internet speed, storage space, and even nostalgia for early 2010s TV production, 480p might be the smarter choice.
Assuming you intended:
A: Yes. Decoding 1080p uses more CPU/GPU, draining battery faster — important for laptop or tablet viewing.