Images and videos

I’m not able to adjust the images and videos to display full screen on the projection out put, the images are coming out square and the videos are coming out maybe 1/4 screen
thanks for any help
Joe Coffin

Resolution confusion ?

how do I change the resolution for only the video I’m playing the (Add Multimedia ) everything else is fine, I did get the images figured out
thank Joe

when I do the test pattern it’s good, but when I do a video it showes like this square