If you want to download videos from YouTube using Safari you have to open Safari's Activity window (Command+Option+A) and then double click on the entry where the red arrow is
http://i.min.us/jbkJqzlkJk4dHi.png
Since a couple of weeks I must additionally press the *Option key* in order to make this work. Is it just me or did Apple recently change the behavior?
Žorvaršur
OS X 10.6.8
MacBook Pro 17'