Hi Anna,
Have you worked through the instructions on viewing videos in the Frequently Asked Questions section of this course? The latest versions of browsers tend to silently hide content from mixed sources and you may have to enable it for your browser.
Can you let me know the location and name of notes that you cannot open as it all seems fine to me?
Specific questions about the course organisation should be sent to the course organiser, course secretary or use the Course Discussion Forum in the course. This course and forum is open to all students in Moodle and is for more general questions about using Moodle.
Wesley