If picture quality seems to shift mid-episode, that's not a glitch — it's the app adapting to your connection in real time.
Most streaming apps use what's called adaptive bitrate streaming — the app continuously checks your connection and adjusts video quality up or down to keep playback smooth rather than letting it buffer.
A brief drop in resolution is almost always preferable to a frozen screen. The app is trading a little picture quality for uninterrupted playback.
A more stable connection means fewer quality shifts. Our guide on fixing buffering while streaming and our comparison of Wi-Fi vs Ethernet for streaming both cover ways to firm up your connection.
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