I made an (elementary) video on the Jewish Calendar, which goes through the basic principles from beginning to end, and actually uses them to calculate the full calendar for 5780. It came in just under an hour. I don't mean to advertise (instead of asking a question), but I wonder a) Does another such course exist? b) What would be good venues to find people interested in watching such a course? I could post the link(s) to Google Drive and youtube, but I don't mean to violate the site rules, if there are any. If someone does watch it, c) How could it be improved?