Sometimes, it is video footage that kicks off complex open-source investigations or offer new leads. But how to unearth material? How to search for videos? This series deals with this relative simple question, turning complex quickly. We go over search techniques and what makes them valuable. — Part 1: Yandex reverse video search Reverse video search Let us start with one of the most useful techniques in our métier, to find videos: reverse image search. In this first scenario, we come across an image. We must now find other videos or, if possible, the original footage. Often, videos are being removed because of graphic content. YouTube…