Scene View becomes black

@robertbu @tanoshimi Hi, I recently started working with unity 3d and my scene view becomes black when I try to navigate around at certain angles it becomes visible, and at some angles, it becomes fully black even when I try to paint on terrain then also it becomes black.

here is the video of the same : https://drive.google.com/file/d/1xO20waIhRPTSe2ilXUPezpHk0xowORwZ/view?usp=sharing