Why can't I play HD flash videos in Firefox?

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http://askubuntu.com – I have a Asus U32U-RX128V laptop, it is great. I installed Ubuntu 12.04 and nearly everything works I had many difficulties to install the video card drivers display: :0 screen: 0 OpenGL vendor string: Advanced Micro Devices, Inc. OpenGL renderer string: AMD Radeon HD 6320 Graphics OpenGL version string: 4.2.11762 Compatibility Profile Context libva: VA-API version 0.32.0 libva: User requested driver 'xvba' libva: Trying to open /usr/lib/va/drivers/xvba_drv_video.so libva: va_openDriver() returns 0 vainfo: VA-API version: 0.32 (libva 1.0.15) vainfo: Driver version: Splitted-Desktop Systems (HowTos)