Module permissions

I have added en-fantasticphonics-adult to modules on my pi and it is included in the RACHEL home page. My problem is when I try to access the modules I get so far then I get the message
You don’t have permission to access /modules/en-fantasticphonics-adult/content/video/myliteracy essential words 06.mp4 on this server.

I assume this is a permissions issue. Can anyone confirm this and if possible a solution

Thanks in advance