Explain a cache to beginners with a nearby-copy analogy. Show three labeled diagram states: cache hit, cache miss, refresh. Explain why a stale copy needs refreshing. Use no invented speed percentage or performance guarantee.

SOURCE MATERIAL
Original explanation: A cache stores a copy of information closer to where it is needed. If a requested item is already in the cache, the system can reuse that copy. If it is missing, the system retrieves the item from its source and may store a copy for later. A cached copy can become outdated when the source changes, so it may need to be refreshed. Caching does not mean the copy is always current.

Production requirements: Generate exactly one complete 45-second video, 1920x1080 (16:9), with English voiceover, English captions and quiet background music. Use clear typography, diagrams and simple information graphics; no cinematic characters or filmed presenters. Keep the essential meaning understandable without sound. Generate background music once; if it fails, use silence rather than retrying. Do not create extra versions. Use only the supplied source facts and do not conduct additional research. Do not invent product capabilities, dates, statistics or outcomes. Deliver a finished MP4. This is an authorized public Felo landing-page sample.