Some html editing software may change the pasted code according their standards. If you use such a program make sure the video playbacks correctly in you Internet browser on a local pc and then upload it to a server. If a video doesn't work we recommend you to use Notepad (Start->All Programs->Accessories->Notepad) to check and correct the code.
There are some parameters in the upper code and in the file Ch1_51_Ch1_51.xml. You can change them and the player will be changed.
If you host your site or blog on a Windows Server, this guide may be interesting for you: