One issue is whether or not this type of site operator has or can get the necessary documents.
In addition, operator of BYOT-style programs (who host the tours) will have to go through all those tours to index and cross-reference the content used in them. That is logistically challenging, but at least doable in respect of the tours which have multiple boxes, each showing caps from named movies. It will be far more of a headache to try to identify all the models used in "background" or composite graphics.
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