Hi Kevin!
I’ve tried this dfference matte, but since the materiale has so poor quality, and has no color but only greyscale, the people are being removed also, when the background is removed.
I have earlier seen an effect, where it was possible to paint the content of one frame on another frame in the sequence, but I don’t know if that’s possible in AE.
IF it is, I maybe could isolate the background, increase the contrast and then have more clear differences to use the difference matte on.