I'm working in Blender 3.0. I understand that the Open GL workflow that you display in the video is now found on the top left under Render > View Animation (or Command-F11 on Mac). I've gotten this to work with your source video file bouncing ball but cannot get it to work in my own animation files. What's happening is it's only playing the first 25 frames and I'm not getting any visual, it's a black screen. Any help is appreciated.
That will play the output you have set in the render settings.
So if you have the output set to "//render/my_video.mp4". When you press Ctrl F11, it will look for that movie file in that location.
If it doesn't exist, itcan't play it.
If you have it set to "//render/my_image_sequence_" (and say, for example, the container is png)
It will look for that image sequence and play as many sequential images it can find.
Perhaps you haven't rendered the frames you want to show first.
Try View > Render Viewport Animation.
This will render the viewport using the output settings - then use CTRL F11 to view it.
Hopefully that sorts you out.