I want to know the answer to the following question:
What must be decompressed?
All the background I'm provided with is that "For instance, a compression scheme for video may require expensive hardware for the video to be decompressed fast enough to be viewed as it is being decompressed, and the option to decompress the video in full before watching it may be inconvenient or require additional storage.". Is that enough to answer the question?
Answer: no