"During the spring 2020 semester, when higher education quickly shifted to remote online teaching in response to the coronavirus pandemic,1 faculty and leadership didn't have much time to think carefully about the many details of teaching online. Now that the spring and summer semesters are behind us and we are facing remote teaching during the fall semester and possibly beyond, some faculty members may question whether to require all students in live online classes to be on webcam all the time. As experienced online educators, our answer is no for four reasons."
https://er.educause.edu/blogs/2020/9/dear-professors-dont-let-student-webcams-trick-you