Hmmm wish I could help more with this one, but I’m not familiar with IE9. Are you sure that the SPP (simple popup plugin) windows are only having problems showing the video in IE9? Have you tested that in other browsers?
-Garrett
The videos — both popup and regular — work fine in Firefox, Safari, Chrome, Opera and IE8. (IE8 of course doesn’t recognize HTML5 video tags.) Right now I have a workaround where the video tags don’t get generated if the browser is IE. (My video tags are generated via shortcodes.)
I discovered that the problem only occurs if the underlying Flash video is set to autoplay. IE9 should be ignoring the underlying Flash but for some reason it doesn’t. I can get around the problem with some complicated browser sniffing. But I’d like to find a simpler solution.
I’m digging this up because I have the same problem.
I’m not using wordpress, this is occuring on a website I coded on which I need html5 video with flash fallback to both autoplay (not simultaneously tho…). I’m using swfobject to embed the flash video player.
bobchatelle have you find a fix ? I’d like to know about your “complicated browser sniffing” if that’s ok with you.
I finally got everything working to the client’s satisfaction. This was some time back so I will have to dig into the code.
I just looked at my code, which was even more complicated than I remember. I just attacked the problems by trial and error. The two big problem browsers for me were IE and Safari. Finally, I set things so that the HTML5 video code would not generate for IE if the version was less than 9 and for Safari unless it was for an iphone.
To generate the flash code I used the FV WordPress Flowplayer plugin from Foliovision.
I seem to recall that the Safari problem was that the autoplay would not start until the entire video had loaded.