Stream a Impress presentation with OBS to Youtube

Hello! I have a problem. I want to capture a Libre Office Impress presentation through an OBS window and stream to youtube but it doesn't, it is not posible to watch through the video. Is it possible to show this way the presentation? (Watch minute 45:44 to 46:41 https://youtu.be/tfUj-_TBrRk)
 
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