The fish-eye is nice, and their use of ultra-light UAV is very interesting. The crowd though is a bit on a thin side :)
Re. the crowd: it might be thin indeed—the most trustworthy estimates for the attendance were around 50k people—but for Moscow, this is extraordinary, as almost all protest demonstrations in the last fifteen years or so were of a narrowly partisan nature and had an attendance of several hundred, rarely two or three thousand, up to 6k just once.