Quick question on isolating video of static to check for false negatives (1-P CNMF-E)

[isaac-downs-3]

Hey everyone! Our lab is able to check for false positives at the component selection stage of the algorithm, but we also want to check for false negatives. We're thinking if we could isolate the static variable (remove the components and background), we could review the video to make sure no neurons pop up, which would mean the algorithm missed it. Do you know if there's a way to create/access such a video and how we might go about it? Have you found other ways to check for false negatives?
Thanks in advance!