Remove black top and below video

Hi,

How can I remove the black frame above and below the video on this website:
https://www.procespartners.nl/

Hello, you should edit the video itself:
https://www.procespartners.nl/wp-content/uploads/Proces%20Partners%20opzet%2015%20NoMask%20GEENtvLOGO%20en%20bus%202ePortretten.mp4

Please feel free to ask any other questions that you might have.

Kind Regards, Roman.
aThemes Support