Were these yellow 'lego chunks' originally redbrick?

These buildings look fantastic and exist in all four corners of our realm but my question today is were they originally manifested in regular size redbricks?

Hearts & Minds Meltology, mudflood, Tartaria, antiquitech, repopulation.
Some serious questions are raised and observations made. It's amazing how many truthers know nothing of these issues. Please share these videos.
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