It is supposed that EzP in IE9 shows an error message when the user try to reproduce .ogv video. The message is not reproduced, instead we receive an X mark.

Steps to reproduce

Create Class

Login as admin in admin2
Go to "Setup", "Classes", "Media", and create a copy of the "Windows media" class...
Edit the Class and input
Input»
Name: "HTML5 Video"
Identifier: "html5_video"
Object Name Pattern: "<name>"
Change the "File" [Media] property option
Name: File
Identifier: file
Required: Checked
Media player type: Html5 Video
Send for Publishing

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Login

Login in eZFlow as admin

Set up Video

Create new folder
Name: Videos
Enter "Videos" folder
Create new "HTML5 Video" media attribute
Name: Ogv
Description: Testing .ogv video in HTML5 compatible browsers
File: Upload the .ogv file attached to this TC
Controller: Checked
Width: 300
Height: 200
Send for publishing

Preview

Press "Videos" folder in top menu in eZFlow
Click "Ogv" object
Validate that the Video has no thumbnail and isn't displayed.
Validate that you don't get a message that the IE does not support this feature.