Facade Magic Mask 2.0 - Better Preview

Thanks for that! However, I do face an issue regarding doing a preview because, to do that, one needs to have multiple cameras set-up. I only have a Facetime camera, so for me, doing a preview isn't possible. Do you have a tutorial in which I could get an additional camera so that I can use your method to do a better preview? Thanks in advance!
 
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