Well, I'm here again. Finally, I got to the computer and opened this file and it weights only 146 KB, it seemed to me suspicious.
I created another one, made short mask, just a couple of frames and saved it - it's 5 mb at once. And late I could re-opened it.
But 28 sek of video is a long-long-long hard work!! 😲 Network said me that Color Director will help me to cut moving object quickly. Now i think they tricked me😊
Аt first everything seems to be optimistic: you draw the first frame manually, click on automatic tracking and wait. Bam! and the mask is created, the object is cut out.
Only theoretically. In real life practically you have to fix every damn frame!
Now I doubt about this way, may be I should keep looking for some another method.