My son has a gaming channel, and recently started using his phone for mobile gaming videos. When filming in 1920x1080 the phone only takes up part of the screen, so there is a lot of blank space. I told him he could use a backdrop, but he wanted the look of the dead space being a blurred version of his phone, with the phone still being sharp in the middle (which is an effect we've used in post production before). The only issue is we can't clip the video in post to have the right aspect ratio to then blur. So we need to either figure out how to blur the background to show the cellphone, or film in an aspect ratio that is perfect for his phone, so we can then upload that footage to WeVideo for him to edit. I'm not sure if this makes sense, but if anyone has any ideas, I'd appreciate it. Thanks!

That is brilliant! Thanks so much!