El Stacko ExposerPro- jQuery youtube not closing properly

I am using an old but simple stack from El Stacko (Now Joe Workman) called Exposer Pro.
Its a simple snippet that shows hidden content. The problem is that when I close a youtube hidden element the audio still plays.
The original snippet is:

I have 5 hidden pieces, 4 being youtube. Can anyone point me in the right direction: $j(’#adventreel’).show(‘slow’);$j(’#presenting,#corpreel,#cv, #redbull,#berghaus’).hide(‘slow’);return false;

Website page:

Many thanks