I watched the video 10 times now. Wow!

At the :28 second mark the guy asking a question says...

"Love it! Buying now"

You'll see the yellow "Shop" button highlighted with a red circle

After the guy clicks, the shirt and what is related appears above

Brilliant

There isn't 100 things there, just what the guy is interested in and related products

Then the seller can move onto the next product...

Direct Sales Category Killer...

Remember, in this video you don't hear the seller talking but people in the webinar certainly would