No visual seen from a shared screen in the recording

The recording of our meeting when viewed provided the transcript speech and audio files and the combination of audio/visual/transcription file.  The later file however had audio only - the speaker was heard but not seen.  What caused this?   

I shared "my screen", chose the website where I logged into my account to get to a presentation.  The presentation shared beautifully in real time with audio and visual of the presentation.  The recording however while giving the presenter's audible presentation, did not provide the visual.  Why?