I didn’t think YouTube had such a capability. Just open the video, and if you want to change the view angle, place your cursor arrow in the video image someplace, click, but hold your finger down on the mouse button, and swipe in any direction, up, down, sideways…to see something not currently in view.
That’s what I was doing, and then I noticed a directional arrow symbol in the upper left-hand corner. It looked a bit like a compass rose. That’ll move the view as well.