The filename "CB_sia_siberia_January-22-2021_17-08-15.mp4" likely refers to a recording from early 2021, a period marked by extreme cold in Siberia with temperatures dropping to -73°F and the eve of nationwide protests following the arrest of Alexei Navalny. The file likely documents either these weather events or political activities in the region at that time. Knuckleball weather - Craig Medred