So I've embedded YouTube videos in the presentation, and they work as expected...However, if the user accidentally clicks word "YouTube" at the bottom of the frame, it launches a new tab with the video. When the user revisits the presentation, the navigation controls become disabled.
Note: these are custom navigation controls that we mapped in the Master Slide so that they appear in all of the slides.
This depends on how you have embedded your YouTube video but if you are using embed codes in a web object you can add ?modestbranding=1 to your embed code to remove the YouTube logo from the video. Here is an example of it added so you can see where it should go.