How can I create videos of my app for my portfolio?

I want to show video aspects of my app design, but still keep it stylish. Here is what I’m talking about:

I think he was using Webflow. I’m using Wix. This is the best that I could do:

Another difference is that he used Vimeo while I used YouTube. But basically, I like how he was able to keep the videos small (no ugly borders like I have), and also keep the videos auto-playing. I’m thinking of putting it in a box off to the side, and have a box next to it with supporting text, like this:

Does anyone know how to achieve this in Wix?