tutorial troubles

[jasper23]

Any idea why I'm getting sound but no picture(just black)on the quicktime tutorials?
Have the latest version of quicktime on XP running on Firefox and IE and so far this is the only site I'm having this trouble with.
Suggestions?

[Fabrice]

We didn't have such troubles here ...
Most often such problems appears when using non official codecs like "quicktime alternative", etc ...

The files are .m4v maybe can you download and play them with VLC ?