I believe that the first part was a breakdown (when they shoot a scene to see how the actor looks in the frame, whether it was worth changing something, etc.) and it should not have been inserted into the final version and included in the series, since:
1) with glasses on Stefan's head, you can see all the lighting on the set, the camera and the crew.
2) Stefan laughed at the end because of his "scream", which initially even he did not expect to come out like this. Therefore, the camera was immediately taken away. But because of Stefan's funny presentation, they decided to leave the scene and insert it into the final result (insert it into the series).
And the camera is shaking too much. Therefore, it can be stated for sure that all this was filmed purely for the sake of testing.
