Display randomly chosen frames of a movie

When you open a movie file in with a read message, the exact amount of time that that operation will take is unknowable, but will send a read message out of its right outlet when the file-opening operation has been completed. When you read in a file, you should generally wait for that message to come out before proceeding. In that message, the word read is followed by the name of the file, followed by a success indicator, 1 or 0.