Vicky ( @victoria_jordan ),
If you want the video quiz to count for a grade, then you are restricted in what you can do. The video quiz is an external tool and there is no way for you to change the location of it by editing the contents using the Rich Content Editor (RCE) as it is not inserted into the RCE. What you are doing with the RCE is modifying any instructions or supplemental information that you want to be included with the quiz. This is the same for all external tools. You cannot control what or where the external tool shows its information. This includes the size of the video, which is part of why I stopped using them (they were too small -- I wanted a normal size video for a grade).
If you do not want the video quiz to count for a grade, then you can embed the quiz anywhere the RCE allows. If you create an assignment, page, quiz, or discussion (anywhere with the RCE), you can put the video anywhere you like. But if you create an external tool assignment so that the grade from the quiz will go directly into the gradebook, you don't have any control over the placement.
The notes at the top of the How do I embed a Canvas Studio video quiz in the Rich Content Editor as an instructor? lesson from the Canvas Studio Guide explains.
In Canvas, instructors, teacher assistants (TAs), designers, and Canvas Studio account admins can embed video quizzes from Studio in any feature area that contains the Rich Content Editor, including Assignments, Discussions, and Pages. Media is embedded using the Studio LTI tool.
Embedding a Canvas Studio video quiz in the Rich Content Editor will not post grades to the Gradebook. To post grades to the Gradebook, create an external tool assignment.
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