Rotate Video on TV screen

[Croydon Lights]

I would like to run a video on a tv screen but I need to rotate the screen by 90 degrees so as it will fit in my window
I have set up a virtual matrix on my PI with ver 5.5 FPP but can not get the video to run side ways is there a way to do this

 

[Katekate]

edit the video and rotate it there.

 

[Grozzy]

I haven't tried this on fpp with a virtual matrix but have used it successfully on normal pi3 installs.

If you take the SD card out and open the boot/config.txt on a PC/Mac text editor.

Add/Change display_hdmi_rotate=1

0 for normal
1 for 90 degrees
2 for 180 degrees
3 for 270 degrees

Pi4 is different and you will need to SSH and run a command from the prompt.
DISPLAY=:0 xrandr --output HDMI-1 --rotate left