[PROBLEM] 1080p movie not played, back screen

[effemmeffe]

I'm sorry for the delay, but I wasn't able to cut a significant portion of the movie: I tried to open it in avidemux on my mac, but the program tells me that the file has some problem with the index and something else about some frame I can't remember now and so I should let avidemux to correct it first and ant the end I tried to cut the first 10 seconds, but I got a messy audio and so I don't know if it's still good for testing... Is it?
Eventually I got the movie from another source and as soon I have some time I'll try to play the new one.
Sorry to bother you.