Visibility issue with media9

Visibility issue with media9

I am currently switching to media9 to include video in beamer. I bump into an issue with the visibility option. I want to put two videos on a frame alongside with the list. The first one starts when the page opens along with some items while the second video to show and start when I highlight the second part of the items. Here is my code in hope for a solution:
\begin{frame}{Frame example}
    \begin{columns}
        \begin{column}{5.5cm}
            \begin{itemize}
                \item Blabla
                \item Blabla
                \item<2-> Bloblo
                \item<2-> Bloblo
            \end{itemize}
        \end{column}
        \begin{column}{4.5cm}
            \begin{figure}{
                \includemedia[
                    width=\columnwidth,height=2.8125cm,
                    activate=pageopen,
                    addresource=blabla_video.mp4,
                    flashvars={
                    source=blabla_video.mp4
                    &loop=true
                    &autoPlay=true
                    &scaleMode=letterbox
                    }
                    ]{}{VPlayer.swf}
                \caption{Blabla}}
            \end{figure}
            \visible<2->{
            \begin{figure}{        
                \includemedia[
                    width=\columnwidth,height=2.8125cm,
                    activate=pagevisible,
                    addresource=bloblo_video.mp4,
                    flashvars={
                    source=bloblo_video.mp4
                    &autoPlay=true
                    &loop=true
                    &scaleMode=letterbox
                    },
                    transparent
                    ]{}{VPlayer.swf}
                \caption{Bloblo}}
            \end{figure}}
        \end{column}
    \end{columns}
\end{frame}
Also I notice that Adobe Reader is considerably much slower reading video with media9 than with movie15. Is it just related to my configuration or there is something I am missing like a codec of some sort? Is it related to the fact that a warning concerning a signature field detected appears?
I am running MikTex 2.9, compiling with pdflatex and opening the pdf with Adobe Reader 11.0.3
I hope you guys have an answer...