British commandos raid French coast at Bruneval during World War II

The video discusses the intense training of soldiers for simulated beach landings, emphasizing the repetitive practice until the actions become instinctive. As time progresses, rumors about their final destination spread, causing restlessness among the men. Despite this, they continue to hone their skills to a state of razor-sharp readiness.

In what ways could the men make necessary moves in their sleep?

What rumors were circulating about the men's ultimate destination?