If I insert a hyperlink with an mp3 suffix, the mediaplugin filter inserts the image of a little mp3 player. The user must click the play button to hear the sound. That is the proper behavior.
However if I insert a hyperlink with an flv suffix, the mediaplugin filter inserts an image of a flash player which begins playing the video as soon as the user loads the page.
The behavior of the two media players should be consistent. Specifically, the flash player should wait to play by configuring it with autoStart=false. This is a trivial change to the flv section of filter.php.
The specific context in which I'm experiencing this behavior is in a Moodle 1.6.3 quiz question containing an flv link in the question text. Thirty videos begin playing as soon as students open the quiz!