Oh you mean the film produced by Boris Berezovsky , the one who financed the chechen terrorists with his mafia money?
Gee, I wonder what motives he could possibly have to discredit Putin, who was going after his criminal activities and planning to kick butt in chechnya where Boris had his fellow terrorist buddies stashed?
You should find some believeable, non-criminal sources to put your faith in.
"Last summer, Berezovsky predicted that Putin would not survive until the end of his term as president. Moreover, he took active measures to make that prediction come true. He planned to form an opposition political party, and through grants to dozens of regional NGOs he is creating a local network. In autumn, a series of sensational exposes of secret services and alleged government plans to ban circulation of U.S. dollars in Russia ran in newspapers he either controls or has influence over. Friendly governors reportedly visit him on a regular basis in Paris. Media analyst Yelena Rykovtseva in early October wrote in Russia Journal that various sources-- from newspapers to anonymous experts--assessed his anti-Putin drive to cost more than $150 million."
More reasons to dislike Boris. He either is anti-US or was in cahoots with the terrorists when he ran his famous "trade in your US dollars campaign".
Berezovsky isn't the only person to ask questions about the Ryazan bomb incident. Instead of attacking those who have brought up these questions, maybe you could actually try to answer the questions.