The solution was very simple 🙂 And I’m really stupid 😀 When I had my multicam sequence synced well, I simply needed to export mov clip from begin to end for each synced camera (other tracks disabled). Of course when I exported those moves I checked out option “Make Movie Self-Contained”. In this way my export goes really fast and my movies was small (2,42 Gigs for about 90 min.). After that I imported those movies in project, and made multiclip from them using option “Synchronize by In Point”. That’s all. I simply forgot about movie export option “Make Movie Self-Contained”. 🙂
Sorry for my English. I’m from Lithuania 🙂