Which movie -- Nicholas and Alexandra? Many parts of that movie that are not accurate -- Tatiana exposing herself to a guard, for example. That certainly never happened.
Here's why I'm skeptical about the story of Nagorny and the gold cross:
The only sources I've found for the gold cross incident are Gilliard and Gibbs. Neither Gilliard nor Gibbes were ever allowed into the Ipatiev house, so they could not have witnessed it themselves. They did not speak to Nagorny when they saw him being taken away, so Nagorny could not have told them. In fact, all the servants who lived in the Ipatiev house at the time of the incident were eventually murdered. According to
House of Special Purpose, Gilliard and Gibbs apparently heard the story from a man named Prince George Lvov. Unfortunately, Prince Lvov isn't very reliable. He told all kinds of stories about the Romanovs -- that the entire imperial family had been murdered with bayonets and revolvers in the cell next to his, for example -- so I have a hard time believing him. There's reason to doubt whether Lvov was even in prison at the same time as Nagorny. For me, the most compelling evidence against Lvov's story is that neither Nicholas nor Alexandra mention the theft of a gold cross in their diaries. In fact, both of them wrote that they did not know why Nagorny and Sednev were removed from the house.
I'm not saying the story of the gold cross is impossible. I'm saying we have no credible witnesses to the event, and I personally have doubts based on the little evidence we do have. If you choose to believe Lvov's story, that's ok -- you're absolutely entitled to your opinion and your own view of the evidence. I only object to you presenting your opinion as if it's an undisputed fact.