Two different reasons to change refresh
Windows Dynamic Refresh Rate adjusts refresh behavior according to computer activity. Microsoft presents it as a way to balance responsive interaction and power use. That purpose is different from an application switching output to match a film’s original cadence.
A display running at a dynamic mode does not establish that each film requests its native timing. Inspect the actual app and output behavior if that is the viewing requirement.
Check whether DRR is available
Microsoft specifies supported hardware, including VRR and at least 120 Hz, for DRR. Inspect Advanced display on the intended screen. A missing toggle on an older television should not be treated as an app-installation problem.
If you compare DRR on and off, use the same desktop task or video passage and note the observed output. Do not judge the result solely from a maximum refresh rate printed on the television’s box.
Ask the narrower timing question
For uneven film motion, record the source cadence if known, the output rate and the app used. For battery concerns, inspect the power and display arrangement. Those questions can share a screen but require different evidence.
This distinction prevents a convenient operating-system toggle from becoming an unsupported promise of universal movie matching. It also avoids describing a 120 Hz panel as a source of extra recorded frames.
Questions answered
Does DRR mean every film automatically plays at its original rate?
Microsoft’s documented DRR purpose does not establish that behavior.
Sources & further reading
Official references for the subjects discussed. Service terms and device software can change.