How to test your network while someone else is streaming

Your video call starts lagging when someone else watches a show, or a stream keeps dropping to a lower quality. You want to know whether streaming is affecting your connection, or whether the problem is somewhere else.

Compare the connection with streaming off and on using Connection Stability. It tracks response time, jitter, lost requests, and dropouts over a few minutes. Run the test on the device and in the place where you notice the problem.

Test your connection while streaming

1. Open Connection Stability on the device you want to use for the test. Keep it on the same Wi-Fi network, or the same wired connection, for both runs.
2. With streaming paused and other heavy internet use stopped, run the test for its full duration. Note the response time, jitter, lost requests, and any dropouts.
3. Start the stream on the other device. Let it play normally, then run Connection Stability again from the same test device and location.
4. Compare the two sets of results. If the problem comes and goes, repeat the comparison when it happens again rather than relying on one short test.

Keep the streaming quality and the test setup as similar as possible between runs. If you move the laptop closer to the router, switch to cellular data, or start a large download halfway through, the comparison will not show the effect of streaming alone.

What the results mean

The results stay similar during the stream

If response time, jitter, and lost requests remain close to the baseline, the stream may not be causing a noticeable connection problem at that moment. If the video still buffers, check the streaming device, app, or service too. A single test cannot rule out a brief dropout that happened before or after it ran.

Response time or jitter rises during streaming

Response time is how long a request takes to get a reply. Jitter is how much that delay varies. A consistent rise during playback suggests the connection is under more strain, especially if you notice calls, games, or other activity becoming less responsive at the same time.

Lost requests or dropouts appear during the stream

Some test requests are not getting a timely reply. That can interrupt real-time activities, even if a video continues playing from data it already buffered. Compare again near the router or over an Ethernet cable to help separate a Wi-Fi problem from broader network congestion.

The test is poor with streaming off and on

The stream may not be the main cause. Check whether the connection is already unstable when the network is quiet. The router, Wi-Fi coverage, internet service, or another device using the connection could be involved.

The test looks stable but the stream buffers

The test and the streaming service do not necessarily use the same route or server. The issue could be specific to the streaming device, app, or service, or it could be a brief problem that the test did not catch. Try another video or test again while the buffering is happening.

How to improve the connection

1. Check for other heavy network use. Pause large downloads, cloud backups, and game updates while you compare results. If the connection improves, bring those activities back one at a time to see which one adds the most load.
2. Compare from closer to the router. Keep the test device in the same place for each run, then repeat both runs closer to the router. On Windows 11, check the connected network under Settings › Network & internet › Wi-Fi. On macOS, open System Settings › Wi-Fi and check the details for the connected network. If a closer test is better, Wi-Fi coverage may be part of the problem.
3. Try Ethernet if available. Connect the test device to the router with an Ethernet cable and repeat the comparison. If the wired results are steady while Wi-Fi results worsen during streaming, focus on the wireless connection or router placement.
4. Reduce the stream quality temporarily. Lower the playback resolution on the streaming device, then run the test again. If the other activity becomes responsive, the network may be short on available capacity at the previous quality or under the current conditions.
5. Improve the router's location. Place it in an open, central spot rather than inside a cabinet or behind large objects. If you change its position, repeat the test in the room where you use the connection.
6. Restart the router if the connection is unstable even when idle. Save any work that depends on the network, unplug the router's power, wait about 30 seconds, and reconnect it. Give it time to come back online before testing again.
7. Ask your internet provider if wired tests still show problems. If repeated tests over Ethernet show high delay or lost requests when the network is otherwise quiet, share the times and results with your provider. A browser test can point to a connection problem, but it cannot identify a fault in your provider's equipment.

Why streaming can affect a connection differently

A video stream often downloads data in bursts and stores some of it ahead of playback. It may not use its full data rate every second, and many services lower video quality automatically when the connection slows. That is why a video can keep playing while a call or game feels laggy.

Connection Stability checks how reliably requests get replies during the test. It does not measure the stream's picture quality or prove that every service uses the same network route. The most useful clue is a repeatable difference between the quiet-network run and the run made while the stream is playing.