Video ad not being block in Safari

[earthling]

All video ads on the site biertijd.com are nothing being blocked.
They are blocked with adblock plus in other browsers, but not in safari.
For example this video start with an ad about a movie: http://biertijd.com/mediaplayer/?itemid=49572

[mapx]

due to the limited api support in safari, the video ads can not be blocked (or can be blocked only in some cases, using some workarounds)

read also
forum/viewtopic.php?p=91565#p91565