Streaming platforms like Netflix have to balance picture quality against the bandwidth a household actually has available. Modern codecs such as AV1 and HEVC compress 4K HDR video far more efficiently than older formats, and adaptive bitrate streaming automatically steps quality up or down as network conditions change, so playback keeps running instead of buffering.
This section covers the bandwidth thresholds, codec tradeoffs, and home-network settings that affect real-world 4K streaming quality. See the guide below for the full benchmark.