With Apple DVD Player 1.0 and Mac OS 8.5, if you select "Apple DVD Player Help..." from the Help menu, the application will not respond and the help system will not appear.
As a workaround, double-click the file named "Apple DVD Player Help" located at the following location:
System Folder
Help
Apple DVD Player Help [folder]
Apple DVD Player Help
You may find it useful to make an alias to this file and put it somewhere that is more accessible.