A "speaker grill" is a protective covering usually made of metal or fabric that is placed over the front of a speaker to protect it from damage and allow sound to pass through. Full definition
From the video, we can see the USB Type - C port along with speaker grill on the bottom edge. (phoneradar.com)
Finally, the smartphone is also tipped to feature a wide speaker grill at the top that sits in - line with the front - facing camera. (mobilesyrup.com)
On the bottom, there is the USB Type - C port along with speaker grill and one of the four microphones. (droidholic.com)