Hi, Tara - I am not sure in which class the student is having issues. I just looked at your MCOM 5 class where you have a Flipgrid assignment. All is working beautifully. In fact, two students have submitted videos. So very cool, by the way!
As you may know, Flash is required for FlipGrid to work. It could be that the student doesn't have Flash enabled in his browser. Here are instructions on how to enable Flash in Chrome and enable Flash in Firefox to give to students.
For those new to FlipGrid, I thought I'd share some info.
How to Use FlipGrid as a Student in Canvas
Michelle Pacansky-Brock made a a couple of great videos showing students how to participate in a FlipGrid discussion in Canvas, either with their computer and a webcam:
Or students can participate with their smartphone and the Canvas Student app (Android, Apple) and FlipGrid app (Android, Apple) installed:
These videos can help students not only see how to successfully use FlipGrid but also help assuage any fears some may have about recording video.