Here is the minimum number of rules I was able to add to a Privoxy setup to let the Têtes à claques videos through:

{ -block }  
www.tac.tv/modules/population.php  
www.tac.tv/ajax/populerSlider.php  
.tetesaclaques.tv/ajax/populerSlider.php  
.tetesaclaques.tv/ajax/populerSliderIndex.php  
.tetesaclaques.tv/modules/population  
tac.ads.streamtheworld.com/crossdomain.xml  
tac.ads.streamtheworld.com/adxml_video.php  

The same rules may be useful to anybody wanting to watch contents delivered through streamtheworld.com without disabling their ad-blocking proxy entirely.