What is the API that websites like tvtime.com is using to get every screencaps from any tv show episode?

I am curious to know how the website tvtime.com is able to get screencaps from any tv show episode. When a user wants to create a new comment, he can select a screencaps from the episode to support his comment.

Using https://developers.themoviedb.org/3/tv/get-tv-images, it possible to get images linked to some episodes. But TvTime is able to get a time code for each image and then reconstruct the whole episode with only screenshots. More over, even the last episodes (day one of release) are available on the website.

<img src="https://d13j6grgpiesth.cloudfront.net/show/121361/episode/7121405/1262-122.jpg" />

When I inspect the source image on the website, I can see that it is probably linked to some personal host from the website (cloudfront host), so it does not give any information on some API that could be used.

If you have any clue on how this website is able to do that, I would be pleased to hear it!