A Microsoft digital storytelling app for creating and sharing interactive reports and presentations.
The code you have mentioned should work for YouTube videos. However, there is a catch: it will only work on Embed cards, not on Video cards. As soon as you commit the embed code, the card will automatically convert to a Video card. If you want it to remain an Embed card, as soon as it converts, press the Undo button to turn it back into an Embed card. That should allow autoplay to work.
Full screen is one of the controls that the user will be able to click on the video player.
You will not be able to add any logic about when it should and should not play based on the embed state.
Hope this helps!
Jason