When you are logged in to your Flipgrid Educator account (admin.flipgrid.com), the videos from your community) will appear as a list. Here you can watch, moderate (hide or show) videos, edit details, add a comment, provide private written, rubric, and video feedback, edit captions, and more.
If you want to view the grid of videos, you simply need to access the Topic as a student. To do so, either access Flipgrid the same way you have instructed your students to do so. Additionally, you can click on the join code when you are looking at the Topic in your Educator Account.