Why does streaming keep freezing even with a fast internet connection?

A 100 Mbps connection should normally be enough for 1080p and even several simultaneous streams, so the raw speed probably is not the main issue. Try connecting the TV or another device directly to the router with Ethernet. If streaming works reliably that way, investigate Wi-Fi interference, distance, walls, crowded wireless channels, too many connected devices, or a weak router. Testing with different devices will also show whether the issue is limited to the TV.

More details are needed before blaming the connection. Check the internet service provider, router or modem model and age, whether the home service is wired or cellular, and the actual results from a complete speed and stability test. Also test YouTube on a phone or computer, not just the TV. If every device has the same problem, restart or update the router and contact the provider; if only the TV is affected, check its Wi-Fi signal, software, and network settings.

Hotspot and cellular home internet can behave differently from a wired connection. They may be throttled, congested, or affected by signal quality, and cellular links can have higher latency or packet loss. If the problem happens on both the home connection and mobile hotspot, compare the results at the same time and location. For a cellular setup, the provider may need to investigate the signal or network conditions; changing advanced settings such as MTU should only be done after confirming that is actually the problem.

A high download-speed number does not necessarily mean the connection is stable. Packet loss, high latency, or jitter can make streaming freeze even when a speed test looks fast. Run a test that reports latency, jitter, and packet loss—not just Mbps—and make sure no other devices are using the connection during the test. If the results show problems, the cause could be the router, its cable, Wi-Fi signal quality, or the provider’s outside line.