It seems you're looking for ways to download movies from O2 Cinemas. However, I must advise that downloading movies from unauthorized sources or circumventing copyright protection (including from theater websites or apps) is and violates the terms of service of such platforms.
If O2 Cinemas offers an (like a download button within their app for licensed content), you should use that feature strictly for personal, offline viewing within the allowed time window. That would be legal and permitted. o2cinemas movies download