Youtube嵌入式不会出现在Safari 5.0.5中

Question

以下youtube嵌入代码适用于Firefox和Chrome，但不适用于Safari 5.0.5：

<div style="width:100%; height:390px; padding-top:30px"> 
        <object style="height:390px; width:640px">
            <param name="movie" value="https://www.youtube.com/v/123VideoID?version=3&feature=player_detailpage">
            <param name="allowFullScreen" value="true"><param name="allowScriptAccess" value="always">
            <embed 
            src="https://www.youtube.com/v/123VideoID?version=3&feature=player_detailpage" 
            type="application/x-shockwave-flash" 
            allowfullscreen="true" 
            allowScriptAccess="always" 
            width="640" 
            height="360">
        </object>
</div>

为什么这在Safari 5.0.5中无效？

到目前为止我唯一尝试的是

youtube.com/embed/123VideoID` 

而不是

youtube.com/v/123VideoID