>Copyright law is complex and really difficult to enforce. This is a good introduction, but any more depth is beyond the scope of this course.
There seems to be some confusion about “open” software (which may be free but that is not the same thing). There are very specific types of copyright for open, sharable, reuseable work.
Creative Commons http://creativecommons.org/
There were a lot of specific questions. There are many resources that address these concerns. For example, if you want to know about the legal issues associated with uploading concert video to YouTube, consult the YouTube web site. There is a lot of information there if you are interested.
Pictures may be copyright as well. There are lots of sites that offer pictures that you are permitted to copy.
WikiEducator Image Hub
It is important that everyone understand how copyright infringement has long-term wide-spread consequences.