I tried 2 different SM versions: 3.9.8 and current 4.0.10 on 3 different Win 7 machines. Neither of these show hands video, even on from-the-box projects (Chasse-Neige), with assigned sample video from folder \SeeMusic\SeeMusic_Data\StreamingAssets\sample video\ . Creating new save file, piece, and manual assigning also doesn't show video. Repositioning video and similar actions don't work either.
What's wrong, or what I'm doing wrong?