Formats not supported, but only over network share

Hi

I have a bunch of video files that all play when on HD connected directly to WD TV Live.

They also all play over network, when accessed from the media server service on my NAS.

But a lot of them (most) do not play when accesed with nas as network share, with a message that file format is not supported. What is up with that?

Thanks

That tends to happen if the files don’t have enough permissions to be played over SMB, how are the permissions in the security tab?