A movie may display as a blank (white or black) object for one of these reasons:

1. There is a message that begins with Can’t find movie. In this case, the link to the movie file is broken. Make sure the movie file is in the proper location. See:
How do I transfer a Logger Pro file containing a movie or image to another computer?

2. The file format is not supported. See:
     My movie doesn't open in Logger Pro. What can I do?