The codecs are installed onto the computer, and are not part of the game, so I assure you that if the videos could work, they would even with the codecs on the computer.
Thank you anyway
I can't spot any tell-tale signs that you'd usually get if it was a copy apart from that the screenshots on the back have had blocks of colour removed, so it looks unclear. Are the discs meant to have an indication such as 'disc 1' or 'disc 2' on them, are meant to be in colour? I want to first establish that it isn't a copy.