frame size changing, odd gaps on the sides

Hi, I just noticed that when I create a new sequence in Premiere Pro and import a video into the timeline, there are gaps on the left and right sides. It’s not a huge problem, but I don’t know why this is happening. In the sequence settings, the frame size is correctly set to 1920x1080, but on the right side of the window, it says '120:67'. This number should be 16:9, not 120:67. I'll add screenshots so you can understand better. Thanks!