1 . for course page header issue please try this css :
.single-course.c2 section#title, .single-course.c3 section#title, .single-course.c5 section#title { padding-top: 30px; }
2 . Well I have just tested it yesterday and did not find any such issues .This must be some other third party plugin causing this .
3 . fix for this coming in upcoming update of vibe course module plugin .
4 . fix for this coming up in wplms theme version 3.9.3.4 .
5 . for this please try this shortcode (wrap the iframe embed code in shortcode) like this :
[iframevideo]<iframe src='https://www.youtube.com/embed/MFtX9ussRKk' width='560' height='315' frameborder='0' allowfullscreen=''> </iframe>[/iframevideo]
Please provide some time to check the all issues mentioned in CSV file .