Unicast sends data from one sender to one addressed receiver. An internet streaming service commonly serves separate requests to each viewing device, even when many people watch the same programme. Caching can reduce repeated work elsewhere in the delivery system, but each viewer still needs sufficient last-mile network capacity.
A practical example
Two televisions playing the same match can each receive their own stream through the home router. Their combined traffic matters to the household connection, and one television's successful playback does not establish the quality of the other's Wi-Fi link.
A common misunderstanding
Do not assume that one subscription or one programme means only one network stream. Separate playback sessions may consume separate bandwidth and may also be subject to account limits.
Related terms
Stable technical definition. Editorial approach