Keynote to USB stick to Samsung monitor

I use Apple Keynote for creating weekly announcements. In the past, I was exporting them to a PowerPoint file, then using a PC to open PowerPoint to create a movie file. I would save that file to a USB flash drive, insert that USB into a Samsung TV, then run the weekly announcements on the TV Monitor. I would like to eliminate using a PC and PowerPoint by creating a movie file directly from Apple Keynote that will run on the Samsung TV. The Samsung TV does not have an Apple TV connected to it. The movie file is on the USB drive, but the Samsung TV doesn't recognize it. Thoughts? Any help is welcome.