I was recording videos in Studio with no issues.  Now, when I try and make a video on the playback the only screen I see is my desktop picture.  The only thing I have done differently since making my last video is I was required to download an upgrade macOS Catalina Version 10.15.4 on my computer.

I am doing all the same steps to set up my video that I had done before. I have downloaded the Screen Capture Application.  Yet, when done recording and then previewing my video all I see is my webcab in the lower right corner with my desktop picture in the background.