To add your Spotlightr video to Wix you must use the HTML element provided.

Wherever you want to add the video you need to add the "Embed HTML" element by browsing to Embed Code >> Popular Embeds >> Embed HTML as shown here:

In this example we are adding the element to the middle part of a new section. Once the element is added configure the settings and add your video embed code:

Then just drag the corners of the video to your desired size:

Here's how it looks on the page:

To add our videos when using their "Online Programs" app, you would use the HTML code option here:

Then add our embed code:

You can adjust the size of the video by adjusting the width of the container here: