by Will Taylor.
Am working now with Moodle v.2.3.1+, and having this same problem, with videos in the embedded QuickTIme player looping by default.
The filter system of course is changed, and in this version,
/filter/mediaplugin/filter.php does NOT contain any references to "loop="
(I have searched it until I'm blue in the face)
? how to stop default looping ?