Ricky has been looking into the problem of film piracy and how cinemas are tackling it.
Some criminals sneak video cameras into cinemas to film the movie and then put it onto dodgy DVDs or the internet.
Doing this is against the law and costs the movie industry millions of pounds.
In his latest Ricky Investigates report, Ricky shows us how to spot the difference between a pirate DVD and a real one - and how cinemas are using night vision goggles to track down the criminals.
Pictures courtesy of FACT and Universal.