Keynote playing videos double time on M2

Hi MPU gang. I have a real problem with my new M2 laptop. I download videos to embed into Keynote alongside my other slides. Everything is fine when I play from the laptop itself or an extended monitor. But as soon as I plug into a large TV with HDMI it plays the video double time. There is also no sound, but I’m not sure if that is related or not. Things I’ve tried:

  • I’ve rebooted the laptop and Keynote.
  • I’ve tried multiple TVs and videos and I’m having the same issue with all.
  • I also plugged into the USB C port with a dongle and the same thing happens there too.

For now, I’m playing the exact same slideshow through my iPad with the same TV, HDMI cable, and dongle so it seems to be an issue with the laptop.