Sequencer export error

Hi. I’m trying to render a green screen video in Unreal with the sequencer but I keep getting errors.

When I preview the video in the cinematic viewport or the default viewport they look fine, however when I export it seems like there’s some frame issues, when I export it with Apple ProRes it looks as if the video would be looping and skipping frames and going back and forth.

When I export it in AVI the green screen footage plays slower than the sequencer, meaning that when the sequencer ends the green screen video doesn’t so it looks cropped.

What I’ve noticed is that in some video players it looks better than in others. For example when I play the video in VLC it looks laggy, when I play it in MPC-HC looks better but still with some issues.