Passing video URL from one API to another API to embed video

Hello - I am very new to FlutterFlow & seeking help to understand how I can achieve the below:

1. I have an API that return a list of videos - with info on each video such as video URL, poster username, location, date created.

2. I have another API that need the individual video URL from the 1st API to return a HTML embed code. I need this HTML embed code to use in the Web View widget to display the video.

3. If successful, the 2 APIs will work together to return a list of videos - each with video information and the embedded video itself.

I am having trouble figuring out how to retrieve the video URLs from the 1st API and pass each into the 2nd API to retrieve the HTML embed code for each video. I've attached a picture for reference.

I am quite stuck in this & would really appreciate any help the community can provide!