What is your Firmware? CHL5DEUC 2005.0?
It's not tested but I insist you can play videos on your TV with SamyGO Firmware Patcher tool
Leave comments if you are successful...
I could say that, don't wait firmware hack for this version because we have no shell access to CI+ devices.
Because you cannot run RSA Disable on this type of HW's. So even if you could, you cannot burn this FW to your TV...
It is possible to hack this device with custom FW image loading at bootloader commands but this require some profession, even I don't tried such a thing but there is a road available that way.