So far I can spot 2 cockerels, the one with the big pink comb is a cockerel. It would help if you posted pictures because the videos are too shaky and it's hard to describe every chick that's a rooster. Remember to take clear pictures of their comb and body.
Oh right . I heard 1 crow. But wen I sat watching them. 1 of them had all the neck and mouth movement but no noise. And the one that crowed that I heard. Didnt do any thing . So still not sure witch ones are cockerals