Is there a way to launch any video players (not just Windows Media Player) to play videos after idling like as a screen saver?

Hello.

I would like my old, updated Windows XP Pro. SP3 to launch a video
player (not just Windows Media Player; it could be any I tell it to use)
and play various video files (mostly MPEG/MPG-2 and TS formats) after a
couple hours of being idled like it does for screen savers. Is there a
way? If it requires a third party, then it needs to be free and light.

Thank you in advance. :)
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