I just did a quick test of v5.13 and was able to play back some test files in both MOV and WMV formats. If you're having problems then make sure your system is up to date. (e.g. For WMV, make sure you have a recent version of Windows Media Player installed.)
If you're still having problems then you can send us a sample file that demonstrates the problem by submitting a bug (Help -> "Submit bug report" in Scribe's menus), checking the "I can provide an example file", then following the instructions on the next page to upload the file.