Is there any way to set a read-only flag on a movie?

I'd like to send students example movies but hide the code/events so they can't see how it's coded. This would be good for assignments and projects that they have to do.

Of course the best way is to have a stand alone alice player (like a Powerpoint viewer), but I know that has not been created yet.

If there's no way to do this, then this is my suggestion.