The text, what is the “Lorem ipsum dolor sit amet..” etc. will be get out from the posts, as they are, as a html code, and you can put that into the slider as it is. If your video is there for example with a html tag:
https://www.w3schools.com/html/html5_video.asp
If you switch to see the html code, it is like this: https://www.nextendweb.com/wp-content/uploads/2013/09/video.png
In the frontend:
https://www.nextendweb.com/wp-content/uploads/2013/09/post.png
Then the Smart Slider is getting out the html code with everything, the text and the video, and it puts it into one variable:
https://www.nextendweb.com/wp-content/uploads/2013/09/variable.png
And you can put that variable into the slider:
https://www.nextendweb.com/wp-content/uploads/2013/09/slider.png
But you won’t have control over the texts and the video, they will be formatted the same way, as they are in the post, under each other, just like in the post.