1) There are some instructions on using/customizing the dashboard atHow do I use the Dashboard as a student? If you want to change the courses listed on the dashboard, that is done by "favoriting" them, which is explained atHow do I view my favorite courses in the Card View Dashboard as a student?
2 & 3) This is an international discussion board with Canvas users from schools all over the world, so we don't have any information about specific materials or courses that may be on your school's Canvas server. If the videos and page are something specific for your school, you'll probably want to contact the Help Desk at your school.
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