This is covered in the installation readme
Either you download the files discussed in the thread here:
http://a2asimulations.com/forum/viewtopic.php?p=161307#p161307Also make sure you have "Disable desktop composition" UNchecked in the compatibility options (in the properties of the Bob shortcut).
Alternatively you can download a legacy video codec, but I had problems installing it, so I would not recommend it.