YouTube / Wix videos not working on Dynamic Pages

@lmeyer Hello sir, I got a similar problem. Please check the image below. At the moment, I got 2 items in that collection which contains different youtube links, and I connected a single video player to it (shown below), the issue is only the first youtube url appears. Even I am already in item 2 in the live page, it shows only the youtube of the 1st item in that collection.

Also, I cannot see the dataset icon in my editor mode, so that is why in the image below I created 2 datasets which second one is named as dataset2. Can you help me find where is the icon for dataset1?