A system update changes device software; a restart reloads it. Neither action is the same as deleting a player or resetting the television to its initial state.
Before proceeding, identify the exact hardware and the symptom you are investigating. A manufacturer update procedure for another model can have different menu labels and preparation requirements.

Record the starting state
Read the model and installed system version from the television’s information screen. Note the player version separately. If a developer says a particular system release is required, keep that requirement with your notes instead of assuming that any available update addresses the reported problem.
Keep the device powered according to its manufacturer’s instructions. Do not interrupt an update because the picture briefly changes or the television restarts itself. If the manufacturer gives special preparation or recovery instructions, follow those for this exact model.
Use the system’s own update route
Google’s Android TV troubleshooting guidance locates software updates within device Settings and About, with wording varying by device. Open the offered System software update or equivalent official updater. Review the available update and complete the displayed prompts.
Use only the manufacturer’s supported firmware route. An Android APK is an application package, not a substitute television firmware update. A file carrying a similar product name is not enough to establish that it is safe for your hardware.
After completion, return to the information screen and record the installed version. If no update is offered, report that state accurately; do not claim that you installed the release merely because you checked for it.
Restart and compare one repeatable action
Use the device’s supported Restart control when appropriate. Then open the same player and repeat the specific action that failed. Keep other settings unchanged so you can describe whether the behaviour improved, persisted or changed.
If the problem remains, a useful support report includes model, system version, app version and the repeatable trigger. A factory reset would remove more state and needs its own reason and preparation. A completed update does not verify a service account or guarantee future playback on every programme.
Useful answers
Is a system update the same as Update all in Google Play?
No. Google Play manages applications; the device updater manages operating-system or firmware software.
Should I factory reset if no update is available?
Not as an automatic next step. Preserve the specific symptom and follow the exact device or app support procedure.