Recognize the specific comparison
Microsoft’s video-playback guidance notes that different refresh rates across multiple monitors can cause video to stall or repeatedly start and stop. It suggests aligning monitor rates as a troubleshooting comparison. That is one documented possibility, not a universal explanation for buffering.
First note whether the issue occurs only with both displays active. Keep the same programme and connection while inspecting the displays. A problem that persists unchanged on one screen may need another investigation.
Align a supported pair
In Advanced display, inspect each monitor’s current rate. Where both support a common mode, compare that arrangement with the previous one. Record resolution as well, since a mode change can alter more than timing.
Replay the same troublesome passage. If the behavior improves, preserve the before/after record and decide whether the common mode suits normal use. If it does not, return to the preferred setup rather than accumulating unrelated changes.
Respect the platform scope
The Windows Video playback settings page affects apps using the built-in Windows video platform. It is not a universal control panel for every independent player. Check which component the affected app actually uses before assuming an operating-system video toggle controls it.
A clear report identifies the two rates, layout and app, plus whether the same source works with one display. This keeps a display-timing hypothesis distinct from a claim that the service or network has been tested.
Questions answered
Does every video interruption mean monitor rates differ?
No. Microsoft lists this as one possible multi-display cause.
Do Windows Video playback settings control every player?
No. Microsoft scopes them to apps using its built-in video platform.
Sources & further reading
Official references for the subjects discussed. Service terms and device software can change.