Buffering · browser · diagnosisYouTube 4K on PC: find the buffering cause

Use the same segment for comparisons. A single failed video is not evidence that all playback is affected.

1. Open a known video offering 2160p and inspect its quality list.
2. Update the browser from an official source and close extra tabs and background downloads.
3. Compare 1080p and 2160p. If only one browser fails, check its extensions and settings.

Use player diagnostic statistics when available to inspect buffer health and dropped frames. High CPU or graphics load with sufficient buffered data calls for a separate decoding check.

1. Record the quality, pauses and buffer changes during the affected segment.
2. Check computer load and retest without demanding background apps.
3. Get graphics driver updates from the manufacturer. Compare hardware acceleration settings and restore the previous setting if playback worsens.

Google's sustained-speed recommendation is not a KRLINK speed commitment. Test at the times when you normally watch.

1. If possible, compare Wi-Fi and wired networking on the same computer.
2. Where permitted, compare a normal connection and your personal KRLINK profile on the same segment, changing only the connection path.
3. Restore the original path if results worsen. Send support the time, OS, browser and symptoms without subscription credentials.