✅ Watching on a phone during commute ✅ Limited data plan or slow internet ✅ Older device with little storage ✅ Classic films / animation (less punishing for compression)
A Blu-ray has 7.1 channels of lossless Dolby Atmos (bitrate: 4,000 kbps). A highly compressed movie often uses (bitrate: 96 kbps).
If you are looking to write a critique or a "solid essay" about these themes, focus on how a movie balances its weight:
One of the oldest tricks in the book is masking an executable file (.exe) as a video file. A file might be named Avengers.Endgame.4K.mp4.exe . If a user has "Hide file extensions" enabled in Windows, they will only see the .mp4 part and double-click it. Instead of a movie, they install a trojan, ransomware, or spyware.
Balance storage space against viewing context. When in doubt, remember the encoder's motto: “Keep it small, keep it playable, keep it moving.”
Then there are files that push compression to the extreme. You might see a 4K movie compressed into a mere 300MB file.